Table of Contents
When should I divide Siberian iris?
When should Siberian irises be divided? Siberian irises don’t have to be divided as often as bearded irises. It’s advisable to divide Siberian irises when clumps become crowded, plant vigor declines or clumps have formed solid rings with bare centers. Siberian irises can be divided in early spring or late summer.
Can I divide Siberian iris in fall?
The best time to divide is in fall. It’s simple to do but because Siberian iris roots are so dense, it can be hard work.
Will Siberian irises spread?
Siberian iris grows from underground rhizomes. The rhizomes spread out beneath the surface of the soil to form a network that holds back the soil during rainstorms. This feature makes the plant useful in erosion control. Since Siberian iris does spread, be careful about picking a place in which to grow it.
When can Siberian irises be cut back?
Cut back Siberian foliage only after it turns brown and withers in late fall. Then, cutting off all leaves an inch or two above ground level is recommended. PESTS: Siberians are more resistant to disease than other garden irises, but do suffer from scorch in those areas where this attacks other Iris varieties.
How do you divide Dutch iris?
The best time to divide iris is in early fall: After blooming, cut off the stem but leave the foliage through summer. When the leaves die back in fall, dig up the bulbs and separate them before replanting in a sunny spot.
Do Siberian iris like sun or shade?
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.
Can you grow Siberian iris in pots?
Planting in Containers 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.
Why are my Siberian irises not blooming?
When you notice iris plants not flowering, the cause can stem from a variety of issues including weather, soil fertility, overcrowding, unhealthy rhizomes, insect or disease attack, planting depth, and even site conditions.
What can I plant with Siberian iris?
Great Companion Plants for your Siberian Irises Alchemilla mollis (Lady’s Mantle) Artemisia schmidtiana ‘Nana’ (Wormwood) Euphorbia polychroma (Cushion Spurge) Tanacetum coccineum (Painted Daisy) Aquilegia (Columbine) Campanula glomerata (Clustered Bellflower) Hardy Perennial Salvias (Sage) Paeonia (Peonies).
Do you deadhead Siberian irises?
There is no need to deadhead your Siberian iris after they bloom but you might want to do so to prevent them from going to seed. Siberian iris can be grown from seed. If you allow their flowers to mature into seeds, they will reseed in your garden.
How do you keep Siberian iris blooming?
For Best Iris Blooms 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.
Do Siberian irises bloom more than once?
Though the foliage will last a long time, Siberian irises only bloom once. Removing Siberian iris flowers once they’ve wilted will not cause the plants to rebloom.
How much water do Siberian iris need?
They enjoy lots of moisture in spring, and will do best if given a minimum of one inch per week during the balance of the growing season, so plant them with other perennials, such as day lilies which also need constant moisture to keep doing their best. Water established plants regularly when drought conditions exist.
What is the difference between Dutch iris and Siberian iris?
Dutch iris grow from bulbs and can reach 18 to 22 inches tall. They bloom in May and June. Siberians are even taller, rising to as much as 36 inches. Both types bloom in shades of white, cream, purple, blue-purple and yellow.
How many iris bulbs can you plant together?
Plant rhizomes singly or in groups of three, 1 to 2 feet apart, depending on the size. Dig a shallow hole 10 inches in diameter and 4 inches deep.
How do you divide and replant irises?
Instructions Dig up the Clump. Using a garden shovel, dig up the entire clump of iris. Divide the Clump Into Sections. Shake off loose dirt, and divide the large clump into sections by tugging it apart with your hands. Trim the Leaves. Inspect the Rhizome Sections. Prepare a Planting Hole. Plant the Iris. Caring for New Iris.
Can iris be divided in spring?
Start dividing them by removing the entire iris clump. To make the rhizomes easier to handle, reduce the length of the blade foliage by half. Discard the older, larger part of the rhizomes as well as any parts of the rhizome that are damaged or pithy.
