How to Grow Siberian Iris: Care Guide | Happy DIY Home (2023)

Siberian Iris (Iris sibirica) is a great way to bring early season color to your garden. The plant’s elegant, frilly flowers look particularly effective when planted in a mass in a floral spring border or pot. The narrow, long lasting foliage remains long after the flowers have faded, creating an effective background to showcase other spring flowers.

How to Grow Siberian Iris: Care Guide | Happy DIY Home (1)
An elegant plant, the Siberian Iris is surprisingly easy to grow.

Despite their elegant appearance these are pleasingly low maintenance plants.

If planted in the correct position, light, moist and rich soil, these flowers are not only easy to care for but they also tolerate the cold and heat well. As Siberian Iris plants mature they grow into large clumps. These require dividing every few years, but like much of Siberian Iris care this is an easy process.

Here is everything you need to know about growing Siberian Iris.

Different Siberian Iris Varieties

There are a pleasing range of Siberian Iris plants available. These come in a range of colors from pales whites and pinks to deeper purples, blues and vibrant orange hues.

While most cultivars can reach up to 3 ft in height, smaller varieties rarely exceed 12 inches. All cultivars are suitable for beds, borders and containers.

Hardiness varies between cultivars. Most are hardy in USDA Zones 4 to 9. Some cultivars are also hardy in Zone 3.

How to Grow Siberian Iris: Care Guide | Happy DIY Home (2)

Take the time to find a plant, or plants, that appeal to your taste and also suit your growing conditions. This makes cultivation a lot easier.

High Standards is a reliable cultivar that produces attractive blue-violet blooms on long, elegant stems. Depending on the conditions the plant can reach 36 to 48 inches in height. Producing similar colored blue-violet blooms, Royal Herald also shares the same preferences and growth habits as High Standards.

The rose and white colored blooms of Strawberry Social help to make it one of the most attractive Siberian Iris varieties. The plant’s blue-green foliage looks its best in full sun positions where the cultivar can reach a height of about 36 inches. Reaching a similar height is the purple or rose flowering Ranman cultivar. Similarly, the reliable Sultan’s Ruby also produces attractive deep magenta flowers.

The compact King of Kings produces delicate white flowers later into the season than other cultivars. Finally, if you want something a little different, the flowers of Butter and Sugar produce attractive yellow and white bicolor blooms.

While bulbs are sold at garden stores the American Iris Society has a list of Siberian Iris nurseries and growers in America. These suppliers often have a wider range of available cultivars which can be mail ordered for fall delivery.

Planting Siberian Iris

Depending on your chosen cultivar Siberian Iris plants can enjoy a spread of up to 2.5 ft, and reach a height of up to 3.5 ft. When deciding where to plant, make sure that you select somewhere with enough space. This means that as the plants grow they won’t overcrowd and smother smaller or slow growing plants.

If you are planting in the soil, your chosen position should be averagely moist. Avoid overly wet positions. This can cause the bulbs to rot.

In warmer areas you can plant in a wetter position such as on the edge of a pond. This helps to keep the plant cool and encourages flowering. Siberian Iris struggles in hot or dry positions.

(Video) How to Plant Iris Correctly for Long Term Success

Plant in a full sun position. While Siberian Iris does grow in partial shade positions it may not flower as profusely.

Plant the corms or tubers in late summer or early fall. In cooler areas you can also plant the tubers in the spring but the plant may not flower as profusely in the first year. Containers can be planted at any time.

How to Grow Siberian Iris: Care Guide | Happy DIY Home (3)
Full sun loving plants, finding the right position for your plants encourages lots of healthy growth and flowering.

How to Plant

Siberian Iris does best in rich soil. Before planting, enrich the soil by working in compost, leaf mold or well rotted manure. This is particularly helpful if you are planting in a light or sandy soil.

While the plants prefer an acidic soil they grow just as well in neutral or slightly alkaline soil types. If you are unsure what condition your soil is in, a soil testing kit is an easy way to find out.

Before planting, soak the tuber and roots in warm water for a couple of hours. If your plants were shipped to you with green leaf ferns and soil washed from the roots soak overnight.

Dig a hole 3 to 5 inches deep in the soil. Fan the roots out slightly and ensure that they are all pointing downwards. Position in the hole so that the point where the roots meet the rhizome is no more than 2 inches below soil level.

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Working the soil over, and amending with organic matter, helps to create a rich, well draining position.

When you are happy with the position of the plant, gently backfill the hole. Take care not to sink the plant.

Pat the soil down gently, being careful not to overly compact the soil. Water well. A watering can is an easy way to make sure that you evenly soak the soil around the plant.

If you are planting more than one bulb space them 12 to 15 inches apart. Different varieties have different spacing requirements, check the plant information before planting.

Keep the soil moist until the plants are established. This can take up to 8 weeks. If you are unsure how much water to apply, aim to give the plants 1 to 1.5 inches of water a week if it doesn’t rain.

Planting in Containers

Your pots should be clean and have drainage holes in the bottom. For a truly low maintenance garden, plant in self-watering pots.

Fill the pots with well draining, fresh potting soil. A tall plant, Siberian Iris does best in large containers.

Plant as described above, soaking the roots before planting in holes 3 to 5 inches deep. Space the bulbs 8 to 12 inches apart and firm the soil down. Water well and keep the soil moist until the bulbs have established themselves. This can take a couple of weeks.

Position your pots in a full sun position.

How to Care for Siberian Iris

Once planted in a favorable position care is pleasingly straightforward.

(Video) Iris Care After Flowering

In warmer climates foliage forms in the fall. During the winter the plants continue to produce tall growth before flowering in the spring. In cooler areas the foliage won’t emerge until after the last frost has passed.

How Often Should I Water?

After planting aim to keep the soil evenly moist until the bulbs are established.

The bulbs also like regular water in the spring. This encourages larger, healthy flower clumps to form.

A soil moisture gauge is a great way to ensure that your soil isn’t drying out. The Atree Soil Meter not only tells you how moist your soil is, it also allows you to measure the pH levels of your soil and monitor how much light your plant is receiving. This is particularly useful when growing sun loving plants.

Remember pots and planters are often quicker to dry out than flower beds.

During the summer the plants cope better with slightly drier conditions. While you shouldn’t let the soil dry out, be careful not to overwater and drown the bulbs.

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When watering, aim to keep the foliage as dry as possible, watering only the soil around the plant. Damp soil can encourage diseases such as mildew to form.

Top Dressing and Mulching

Applying a top dressing of organic matter, such as compost mulch, around the plants helps the soil to retain moisture and cool. As the organic mulch breaks down it enriches the soil. This gives your bulbs a further boost.

Mulching also helps to deter weed growth.

In cooler climates you can also apply a healthy layer of mulch around the plants after the ground freezes. This helps to prevent heaving and thawing. Allowing the soil to freeze and thaw continuously during the winter causes many bulbs and perennials to perish. A layer of mulch prevents this from happening.

When to Fertilize

These are not heavy feeding plants. Apply one dose of nitrogen rich fertilizer in early spring. This encourages foliage to form. Alternatively you can apply a balanced, general purpose fertilizer such as the Miracle-Gro Shake ‘N Feed All Purpose Plant Food. This is a slow release fertilizer that provides growing plants with a steady supply of nutrients.

As flowering ends and the bulb begins to store energy you can apply a second dose of balanced fertilizer.

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When planted correctly, these are pleasingly low maintenance plants. With even minimal encouragement your plants will produce scores of attractive blooms.

After Flower Care

Spent blooms can be cut from the plants.

Once flowering has finished allow the foliage to remain in place. The leaves can still provide height and ornamental interest.

While it is still green, the foliage is also gathering sunlight. Converted into energy, this is stored in the blub, and helps the plant to re-flower next year. Water as needed, to prevent the soil from drying out.

As the cooler temperatures arrive the foliage yellows and die backs. This is a sign that the bulbs are becoming dormant. Once the foliage yellows it can be cut away.

(Video) 🌺 How to Cleanup Siberian Iris Plants in Spring🌼

In warmer areas the foliage may remain green all year round.

Companion Planting

Companion planting is the practice of growing similar or mutually beneficial plants together. Siberian Iris works best when planted alongside other full sun loving spring flowers.

Good combinations include:

  • Columbine
  • Hardy Geranium such as Cranesbill
  • Lady’s Mantle
  • Lupin
  • Peonies
  • Salvia

Common Pests and Problems

If planted in a favorable position and correctly cared for the Siberian Iris is a largely problem free plant. It is also pleasingly disease resistant.

One pest which does target irises is the iris borer. These pests lay their eggs on garden debris in late summer or fall. The eggs then hatch into larvae that bores and chews through foliage, working its way towards the plant’s tuber.

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Regularly check your Siberian Iris plants for signs of infestation.

Borers leave notched wounds and slimy, wet patches on foliage. Once they reach the tuber the pests hollow their way through the root system. They then pupate and hatch as adult moths.

Regularly check your Siberian Iris for signs of infestation. Insecticide sprays are useful for deterring the pest if it is present in your area. Alternatively try washing the foliage in a homemade insecticidal soap. Keeping the area around your plants clean and tidy also helps to deter the pests.

How to Propagate Siberian Iris

Siberian Iris can be propagated either by dividing and transplanting large clumps or by growing from seed.

Dividing and Transplanting

After several years the plants can develop into large clumps. As the clumps grow you may notice the plants forming fewer flowers. They may also develop a less vigorous growth habit. Should these two things occur, your will need to divide the plant.

By dividing the large clump into smaller clumps you help to reinvigorate the plant. This encourages more flowers to form, allowing you to fully enjoy your spring garden.

The best time to divide the plant is soon after flowering has finished for the year. At this point root growth is still active. This means that the transplants, if kept moist, will establish themselves quickly after planting.

With a clean shovel dig up the entire plant clump. Cut the foliage down to a height of about 6 to 8 inches.

Use a sharp knife to cleanly cut the clump into even sections. Each section should have a good root system and several fans of foliage.

Plant each division as described above as quickly as possible. Keep the soil moist for 6

to 8 weeks after planting. This helps the root system to establish itself.


(Video) Beginner's Guide to Iris Plant Care | Lazy Gardener's Guide to Irises

Growing from Seed

If you want to try growing from seed, allow spent flowers to remain on the plant. These give way to seed pods.

In the fall, the pods ripen. Once ripe, carefully watch the pods. As soon as you notice the top of the pod beginning to open, cut the pod from the plant and remove the seeds.


Siberian Iris seeds require a period of cold weather in order to germinate. Gardeners in cooler climates can sow seeds directly into the ground, allowing the natural winter temperatures to chill the seeds. However, growers in warmer climates must artificially create this chilly spell.

To sow the seeds outdoors, sow in the late fall or early winter. Plant each seed to a depth of about half and inch, cover lightly and water in. Germination occurs in the spring, at the same time that mature Siberian Iris plants are in flower. Following germination your seedlings continue to grow throughout the year, before flowering the following spring.

If you don’t enjoy a period of cold weather in the winter, you will need to recreate this artificially. This process is known as stratification.

Soak the seeds in a bowl of water for 5 days. Drain and change the water every day. This removes the germination inhibitor present in seed or seed coat.

Plant the seeds half an inch deep in small pots filled with damp potting soil. Put the pots in a plastic bag and place in the refrigerator. The plastic bag helps to prevent the soil from drying out too quickly.

Regularly check the pots to ensure that the soil isn’t drying out. Gently moisten the soil if it appears dry. A plant mister like the Yebeauty Plant Mister, provides an even, gentle spray that moistens the soil without disturbing the forming root system.

Allow the seeds to remain in the refrigerator for 60 days.

When you remove the seeds from the refrigerator don’t be surprised if some of them have already germinated. The others should germinate within a few days.

Grow the seedlings on in a light position. If you struggle to find a sunny enough windowsill, placing the seedlings under grow lights is just as beneficial.

Gradually harden off before planting outside in the late spring. Water regularly and remember to protect from pests.

During the summer and the fall, as the seedlings grow they develop healthy amounts of foliage. Flowers bloom in the second year.

How to Grow Siberian Iris: Care Guide | Happy DIY Home (8)
An elegant flower, these are surprisingly resilient plants that reliably add color and interest to spring gardens.

Warning If consumed the bulbs and plants are toxic to both people and pets. Wear gloves when handling if you have sensitive skin.

Coming in a range of colors from deep blues and purples to light pinks and whites, the Siberian Iris is a reliable addition to the spring garden. Their long lasting flowers and distinctive narrow foliage means that these resilient perennials are a standout addition to a mixed flower bed. They are equally attractive when used in mass plantings in flower beds or containers.

(Video) Propagation: Siberian Iris Fall Division

Adaptable and hardy, while they are less common than the bearded iris, the Siberian Iris is a worthy addition to any garden.

How to Grow Siberian Iris: Care Guide | Happy DIY Home (9) How to Grow Siberian Iris: Care Guide | Happy DIY Home (10)


Where do Siberian iris grow best? ›

Siberian irises perform best in moist, well-drained, fertile soils. However, they will tolerate poor, dry sites. They can be grown in partial shade to full sun. Siberian irises are usually planted in spring or late summer.

How do you grow Siberian Iris? ›

Siberian Iris prefer acidic soil (pH 5.5 to 6.9). Peat moss, compost, and humus all work as soil enhancers. Plant your Siberian Iris where they will receive full sun. Good drainage is essential, as Siberians thrive in moist but not soggy conditions.

Should Siberian iris be cut back? ›

For best plant appearance when removing spent Siberian iris blooms, cut the whole flower stalk back to the plant crown immediately after the flowers fade. Take care, however, not to cut back the foliage. This foliage photosynthesizes and collects nutrients throughout the growing season.

What is the best month to plant Iris? ›

Late July through mid August is the best time to plant, move or divide iris. Iris is one of the most popular perennials in the garden and easy to grow.

What is the best fertilizer for Siberian Iris? ›

Requirements vary depending on your garden soil, but most successful growers use a balanced fertilizer, such as 10-10-10, or a 14-14-14. Fertilize in early spring, and again after bloom season, to encourage growth for next year.

Can you grow Siberian iris indoors? ›

How to Grow Siberian Iris From Seed Indoors. To start your seeds indoors, you will need to cold stratify them. Soak the seeds for 3 to 5 days, then plant them ½ inch deep in containers with pre-moistened soil.

How do you keep Siberian iris blooming? ›

Remove spent flowers after they bloom to keep seed heads from forming. In late fall, cut foliage to the ground and mulch well after the ground has frozen. After a few years, when large clumps form, divide them to ensure continued bloom.

How long do Siberian iris live? ›

Siberian iris can live for many decades, though the performance will gradually decline unless you divide the clumps every three to five years.

Can you grow Siberian iris in pots? ›

Siberian Irises will happily flourish in both garden beds and containers when given plenty of sunlight and soil with an average amount of moisture. While they will grow in partial shade, the blooms will be more plentiful with stronger light.

How do you prepare iris for the winter? ›

Remove all spent bloom stalks and dead foliage. Trim Iris foliage to a height of about 6 inches. A clean garden will help prevent the spread of various fungal diseases and can discourage overwintering pests from building nests.

How often should Siberian iris be divided? ›

In general, you will need to divide Siberian Iris every three to five years. Hints to determine when to divide include the following: Less blooms are appearing. The center of the iris clump is bare.

Can I plant iris bulbs in March? ›

Flowers can bloom as early as February and March, or as late as August, but most varieties bloom in the spring. Iris bulbs should be planted in the fall for spring blooms.

How many iris bulbs should I plant together? ›

Loosen the soil to a depth of 4 inches (10 cm) before you begin planting. Plant iris bulbs 1 inch (2.5 cm) deep. You can plant up to 3 iris bulbs together for bunches of glorious flowers. Cover your bulbs with a thin layer of soil.

What does an iris symbolize? ›

The Victorian era language of flowers gives a host of meanings to iris flowers. They can represent faith, hope, courage, wisdom and admiration.

Is Miracle Grow good for iris? ›

Performance Organics Blooms Plant Nutrition by Miracle-Gro – Best Overall Irises Fertilizer. This is one of the most fast-acting plant food for flowering plants since it starts showing results within the first week of application.

How do I keep my iris healthy? ›

Water consistently and deeply, especially during summer drought. Keep rhizomes exposed. Unlike bulbs, which thrive deep underground, bearded iris rhizomes need a bit of sun and air to dry them out. If they're covered with soil or crowded by other plants, they'll rot.

How do I encourage iris to bloom? ›

Iris will produce more blooms if a few simple rules are followed. First, irises need lots of sun (at least 6 hours a day) to flower well. Also, they need well-drained soil (add compost to condition the soil and make nutrients available).

Do irises like wet feet? ›

These are actually semiaquatic, and although they can live in dry soil, they thrive in saturated, poorly drained conditions. Most will grow far larger in wet ground than in drier soil.

Do Siberian irises like water? ›

Planting and Care

Although Siberian iris will tolerate drought, they thrive in areas with consistent moisture, particularly in spring and summer months. Throughout the southeast, afternoon shade provides relief from the heat of the summer.

Should iris be covered in winter? ›

Once you have trimmed the leaves back, leave the plant alone. If you live in a cold climate, cover the iris bed with mulch or straw for winter.

How do you look after Siberian iris? ›

To give them the conditions they enjoy, grow Siberian irises in full sun or partial shade with moist, slightly acidic soil and give them plenty of room to spread. They look especially beautiful growing as marginals near water, which will reflect the colourful flowers.

Why are my Siberian iris not blooming? ›

If Iris have been in the ground for several years they can stop flowering either because they are crowded or because over time the soil has become compact and depleted. Siberian Iris often grow into a donut shape when they need dividing, and the center of the clump becomes empty, or worse, weed-filled.

Will iris rebloom if deadheaded? ›

The majority of varieties bloom only once in the late spring, and that's it for the season. Like peonies, even if you deadhead irises, they won't flower again until the next year.

What to do when iris have finished flowering? ›

Split the irises every year, after flowering has ended during June. At this point the early summer leaves and flower stems have started to die back, and the late summer leaves have started to grow. 2. Split individual plants by cleaving the rhizomes with a spade, leaving the part to be retained undisturbed in the soil.

Can iris be left in the ground over winter? ›

Storage Basics

Because they're prone to dehydration and can withstand freezing temperatures, they're usually left in the ground for overwintering instead of being lifted.

How quickly do iris multiply? ›

Moderately-vigorous plants will produce 2 to 3 offsets, and highly vigorous plants will produce 4-5 new offsets to replace the portion that bloomed. That gives you a sense of how quickly irises multiply.

What kind of soil do iris like? ›

Iris will thrive in most well-drained garden soils. Planting on a slope or in raised beds helps ensure good drainage. If your soil is heavy, coarse sand or humus may be added to improve drainage. Gypsum is an excellent soil conditioner that can improve most clay soils.

How cold is too cold for irises? ›

Most popular garden irises are hardy to -25F (-32C).

Should you cut the seed pods off iris? ›

To help keep your iris healthy and productive, you should remove the seed pods as they develop after flowering, or simply remove the individual spent iris blooms and prevent the seed pod from forming. The flower should come off easily.

Should I soak iris before planting? ›

It would be wise to soak iris in a diluted solution (1-9 ratios) of bleach and water for several hours or even overnight before replanting the large new healthy rhizomes. If planting in the fall when dormant, one may wish to cut back existing roots to about three inches.

How many flowers do you get from one iris bulb? ›

Here is how rebloomers work: The rhizome of an iris can produce only one flower stem and it usually takes an entire year to mature and bloom.

Do iris multiply by themselves? ›

One way Iris reproduce is by growing side increases like eyes on a potato. These eyes grow into fully mature rhizomes in one year. This is known as asexual (or vegetative) reproduction.

Should I water irises after dividing? ›

Water the divisions in well. Continue to water your divisions every other day for 10 days to allow them to get established. Divide bearded irises every three to five years for optimum health.

Can you plant iris bulbs in February? ›

Plant Bulbs in Winter for Later Blooms

After the first frost or snow storm, you might assume that your bulb-planting days are over. But as long as the ground is workable, you can plant bulbs! This means that you can plant bulbs as late as January – if you can dig a hole deep enough to plant.

Can I plant iris in January? ›

when to plant irises. The best time to plant bulb irises is in September and October, but they can be planted as late as November. Bearded iris rhizomes should be planted in August-October. Beardless pot-grown irises can be planted from spring to autumn.

What month do iris bloom? ›

It blooms from May to June, producing intensely white standards overlaid with yellow, and yellow-edged white falls. Grow the plant in full sun and well-draining, medium-moist, humus-rich soil.

Do iris like to be crowded? ›

Most iris plants spread by means of underground stems called rhizomes. Rhizomes become too crowded over time, resulting in reduced flowering. By lifting and dividing the larger clumps, you can rejuvenate the old planting, as well as provide a source of new plants to expand your garden or share with friends.

What happens if you plant irises too deep? ›

The tops of the Bearded Iris rhizomes should be visible when planted. Planting rhizomes too deep can result in slow growth and less blooms.

What is the sacred animal of iris? ›

Link/cite this page
Symbols:Herald's wand
Sacred animals:--
Parents:Thaumas and Electra
8 more rows
12 Jun 2018

What flower is the symbol of heaven? ›

Meaning & Symbolism of Irises

The iris's mythology dates back to Ancient Greece, when the goddess Iris, who personified the rainbow (the Greek word for iris), acted as the link between heaven and earth.

What is iris a God of? ›

As a goddess, Iris is associated with communication, messages, the rainbow, and new endeavors. This personification of a rainbow was once described as being a link to the heavens and earth.

Is Epsom salt good for iris? ›

Is Epsom salt good for irises? Epsom salt is only good for irises if they have a magnesium deficiency. 'Unless magnesium is deficient (shown by inter-veinal yellowing of older leaves) there is no need to add magnesium as Epsom salts.

Are coffee grounds good for iris? ›

you can use them without composting on top of the ground as a slow release fertilizer, but only in small amounts. The grounds will get moldy if they are piled up too high.

Do irises need a lot of water? ›

Water: Once established, they are very drought tolerant but would prefer a deep soaking every so often. Constant moisture in warm humid areas will encourage crown rot. Light: Full sun with a minimum of 6 hours to bloom properly. Afternoon shade in hot areas will benefit bloom.

What is the best food for iris? ›

Irises should be fertilized in early spring about 6 to 8 weeks before bloom, and again after the blooms are gone. Because phosphate is important, we recommend bone meal or super-phosphate and a light balanced fertilizer such as 10-10-10 or 6-10-10 depending on the amount of nitrogen in your soil.

Can iris be overwatered? ›

If your iris is overwatered, the leaves will turn yellow and then brown. This usually happens when people are watering their plants too much within a few days or weeks. Overwatering can cause sunburn of the roots, which will eventually kill the plant and make the leaves brown and fall off.

How do you make irises last longer? ›

For longer lasting flowers cut your Iris early in the day with the buds just opening. Place them in a bucket of tepid water and recut the stem end underwater at an angle one inch up. Display your Iris in a cool niche away from direct sun and drafts. Pinch off and remove wilted flowers immediately.

How many years does it take for an iris to bloom? ›

Only 60-75% of Iris bloom the first year after planting. Sometimes they need an extra year to become established. Unusual weather conditions or late spring frosts can also harm Iris blooms.

Why won't my irises grow? ›

Your irises need more sun.

In order to bloom, irises should be getting at least six to eight hours of full sunlight. In climates with extreme heat, they'll need some afternoon dappled shade to keep them from getting scorched. But as a general rule, the more sun they get, the better.

Do you deadhead Siberian Iris? ›

SEASONAL CARE: Throughout bloom season, most Siberians will remain attractive without regular deadheading. Afterwards, however, it is a good idea to remove spent bloom stalks, both for garden appearance and to prevent reseeding. Cut back Siberian foliage only after it turns brown and withers in late fall.

How do you fertilize Siberian Iris? ›

Established Siberian irises don't require a great deal of care. Plants can be lightly fertilized in early spring with an all-purpose garden fertilizer, such as 10-10-10. They can also be fertilized immediately after bloom. A 2- to 3-inch-layer of mulch around the plants helps control weeds and conserves soil moisture.

What month is best to plant irises? ›

Late July through mid August is the best time to plant, move or divide iris. Iris is one of the most popular perennials in the garden and easy to grow.

How long do Siberian iris last? ›

How to Get Siberian Iris to Bloom. Siberian iris, once well established, blooms each spring, provided cultural conditions are right. The bloom period is relatively swift, lasting no more than a week or two.

When should I feed my Siberian iris? ›

Feed Siberian iris plants in spring with a nitrogen-rich fertilizer and fertilize again when blooms are spent. This is the basis of Siberian iris care; they are rarely bothered by rots and borers as are the bearded iris.

How do I prepare my iris for winter? ›

Remove all spent bloom stalks and dead foliage. Trim Iris foliage to a height of about 6 inches. A clean garden will help prevent the spread of various fungal diseases and can discourage overwintering pests from building nests.

How do I protect my irises from freezing? ›

As the temperatures drop below freezing, you can mound a winter protection around your Irises. We recommend straw, evergreen branches or leaves. The key with winter protection is to remove it when the weather begins to warm again in the spring.

How do you keep iris over the winter? ›

Find a Cool and Dry Place to Store Iris Rhizomes or Bulbs

Although, a true bulb, such as a tulip or onion, will also store in a hung nylon stocking. Whichever method you prefer, the key is to allow for air circulation and keep the rhizome or bulb in a cool, dry place until you're ready to plant it again.

Do Siberian iris need lots of water? ›

Keep your plants well-watered until established, with an estimate of about 1–1.5" of water per week for ground-planted bulbs and 1–2" per week for container-planted bulbs. Continue to water as needed during active growth periods. Leave the foliage in place after blooming has finished for the season.

Does Siberian iris grow in shade? ›

Sun and Moisture for Siberian Irises

Try to plant them with other perennials that you normally irrigate during dry periods in July and August. They love full sun (especially in the northern areas) but will grow in light shade.

Is Siberian iris invasive? ›

Siberian irises aren't invasive, but will self-sow. If you let seed pods form, you'll find they have sturdy stems and make nice additions to dried arrangements.

What do Overwatered irises look like? ›

If your iris is overwatered, the leaves will turn yellow and then brown. This usually happens when people are watering their plants too much within a few days or weeks. Overwatering can cause sunburn of the roots, which will eventually kill the plant and make the leaves brown and fall off.

Should you mulch Siberian iris? ›

Fertilizer: Siberian irises prefer a rich, humus soil. Mulching with 1 to 2 inches of organic compost each year helps. If you prefer, liberally apply a balanced fertilizer in the early spring and again just after bloom.

Can irises grow in pots? ›

Iris can be successfully grown in containers. A 6" to 8" pot will work for Dwarf Iris; a 12" pot will work for Tall Bearded Iris. Make sure your pot has good drainage. For soil, we recommend 45% fir bark, 20% pumice, and 35% peat moss.

How tall do Siberian irises get? ›

Siberian Iris typically reaches a height of 2 feet, although some cultivars can be taller. Flowering profusely, clumps can produce 12 to 20 flowers. It is a moisture loving plant, and will thrive near a stream or edge of a pond, wherever soil is evenly moist. Well established plants will tolerate some drought.

Are Siberian iris toxic to dogs? ›

If your dog eats irises, they may salivate, vomit, drool, have diarrhea or lose energy. This is because the iris contains several compounds that are toxic to dogs. Irises can also cause skin irritation.


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Name: Tish Haag

Birthday: 1999-11-18

Address: 30256 Tara Expressway, Kutchburgh, VT 92892-0078

Phone: +4215847628708

Job: Internal Consulting Engineer

Hobby: Roller skating, Roller skating, Kayaking, Flying, Graffiti, Ghost hunting, scrapbook

Introduction: My name is Tish Haag, I am a excited, delightful, curious, beautiful, agreeable, enchanting, fancy person who loves writing and wants to share my knowledge and understanding with you.