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Bearded Iris are one of the true staples of the perennial garden. They are loved by many gardeners because they are easy to grow, deer-resistant, they multiply each year, and many are re-bloomers, putting on a colorful show in the garden twice in one season. There are two planting seasons for these garden favorites and we've outlined everything you need to know, regardless of when you're planting!
Late Summer is the perfect time to plant Bearded Iris rhizomes. They get a chance to establish their roots in your garden before the winter season and will produce significant growth in the spring, often blooming in the first season. You will want to plant Bearded Irises in summer as soon as you receive them, as they need to establish their root growth before winter. The more time you can give them before the end of your growing season, the better.
Bearded Irisare harvested and shipped as potted plants in the early spring, and can be planted as you would in the summer (making sure to leave the tops exposed).
Bearded Iris prefer at least 6-8 hours of sunlight a day. In hot climates (zones 8-11), they will tolerate 4-6 hours of sun. Make sure your Iris get some shade during the day in hotter climates. Bearded Iris prefer to be planted in well-drained soil. To improve drainage, they can be planted on a slope or in a raised bed.
Bearded Iris rhizomes should not be buried completely underground. Plant rhizomes at the surface of the ground. The tops of the rhizomes should be visible; be sure to spread the roots out below the soil.
The most common mistake made when planting Bearded Iris is planting them too deep. Planting too deep will result in few or no flowers.
Step 1: Build up a small mound of soil in the center of the planting hole.
Step 2: Center the rhizome in the mound, roots down, and then bury it about 75%, leaving the top exposed.
Step 3: Firm the soil around the roots. Newly planted rhizomes should be watered thoroughly. Water your Iris once or twice a week during their first fall and during their first spring.
Lavishly ruffled, 'Silverado' Bearded Iris produces silvery-lavender, long-lasting blooms. Once matured, 'Silverado' has tall, sturdy stems that each produce 8-9 buds. Easy to combin...
'Silken Trim' Bearded Iris is unbelievably beautiful with violet and red merlot-colored ruffled falls. It’s hard to resist the allure of its large vibrant flowers! Easy to grow a...
'Brilliant Idea' Bearded Iris is a linen-white flower with rich, bright-blue edging along its lower petals, set against deep yellow-orange beards. Talk about drama! This beautiful ir...
'Speed Limit' Reblooming Bearded Iris captures the eye with its bold, deep-blue color. Its lower petals are each adorned with a pristine white spot directly in the center of each pet...
Anaconda Love Bearded Iris is a striking, two-toned Iris with rosy pink ruffled standards (upright petals) and deep raspberry-colored falls (lower petals), snipped and striped with a...
'Vicar' Bearded Iris has ruffled, iridescent violet-purple flowers. These large blooms have a slightly darker purple beard creating a bit of contrast to the lighter petals. Enjoy 8 ...
Champagne Elegance Reblooming Bearded Iris is breathtaking, distinctive, and beautiful with pure white petals subtly brushed with apricot-pink shades. Golden beards, highlighted by a...
Reblooming Bearded Iris Ziggy is a unique and fun multi-colored flower. Golden-yellow standard petals contrast wonderfully with magenta and yellow streaked falls. With a yellow beard...
'Frimousse' Bearded Iris, originally from France, illuminates the mid-summer garden with peach-colored blooms, wide raspberry-pink falls, and rust-orange beards. A truly bold and uni...
The fabulous 'I'm Back' Reblooming Bearded Iris adds drama to the garden with light-purple petals, near-black falls and deep-gold beards. The contrast of the crisp lavender standards...
The foliage arriving on your rhizomesis from this spring, and can be trimmed when you plant, but leave at least a few inches of old foliage on the rhizome. It will be replaced next spring with deep green leaves. Make sure to give your rhizomes a lot of water right after planting. This helps to remove any air pockets in the soil and gives Iris a better chance of strong growth. Once established, Bearded Iris do not require regular watering. We recommend planting 12-24 inches apart, as planting too close together results in
After the Iris has bloomed; cut back the flower stalks to an inch or two above the rhizome to prevent seed formation. Iris that are growing well may not need fertilizer. Green Foliage is a great way to tell if the Iris is healthy or not. If you do fertilize, apply 1/2 cup of 5-10-10 fertilizer per Iris clump after flowering. Fertilizer can burn the rhizomes; it should be applied around the base but not directly on them. Re-blooming Iris should be fertilized in the spring as new growth begins and after spring flowering ends. Iris respond to shallow (1 to 2 inches) cultivation and should not be mulched. In early fall, cut leaves 6 to 8 inches from the ground, especially if foliage disease occurs.
After 3 to 5 years, Iris generally become crowded and should be divided. Iris can be divided at any time, but many growers prefer to divide 4 to 6 weeks after the flowering period.
Basic Steps to Divide
Step1: Cut the leaves to one third their length.
Step 2: Dig the clump of Iris up. Wash Soil off with a hose.
Step 3: Cut rhizomes apart so that each section has at least one healthy fan of leaves and firm, white roots. Older rhizomes should be discarded since they have limited flowering capacity. (New growth will protrude off an older rhizomes from the side)
Re-blooming irises grow faster than regular irises, so unlike the standard bearded iris, you'll need to divide them more often. To prevent overcrowding, divide re-blooming iris every 2 to 3 years, take only the outside rhizomes of the plant. Leave the healthy older portions of the plant intact. Replant the small rhizomes 12 to 18 inches apart.
Re-blooming iris are not always guaranteed to bloom. It often depends on geographic location, soil and climate conditions. Re-blooming iris can also vary from year after year. They are heavy feeders, requiring a little more water and fertilizer because they need an extra boost to flower again. Re-bloomers require a little more care than the standard bearded iris, but are worth the effort.
Bearded Iris are some of the easiest, most rewarding perennials to grow and we hope that the varieties you purchased from us grow and thrive in your garden. Please remember, all of our plants are backed by our 100% Satisfaction Guarantee. To learn more about the different varieties of Irises, please read our in-depth article "All About Irises." To learn how to plant, care and divide Bearded Iris Read our Bearded Iris Planting Guide.