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www.reference.com/home-garden/iris-flowers-bloom-5b4aa156c5808bf0

When Do Iris Flowers Bloom? Most iris flowers bloom in the late spring or early summer, though some hybrid varieties are remontant and may bloom again in late summer. The Old Farmer's Almanac recommends planting irises in mid- to late summer.

www.gardeningknowhow.com/ornamental/bulbs/iris/iris-plants-not-flowering.htm

When iris do not bloom, you still have beautiful foliage but the long waited for flowers refuse to appear. Frustrating as this is, it is generally something that can be fixed and flowers will appear the following year. There are many reasons for irises not blooming well, but what about why irises won’t bloom at all?

www.almanac.com/plant/irises

Without enough sun, they won’t bloom. They prefer fertile, neutral to slightly acidic soil. If your soil is very acidic, sweeten it with a bit of lime, and forbear summer watering, which can lead to rot. Learn more about preparing soil for planting. Bearded irises must not be shaded by other plants; many do best in a special bed on their own.

homeguides.sfgate.com/irises-bloom-40651.html

The energy the plants are making during this time is stored in the rhizomes for another set of blooms or for next year's flowers. Often irises fail to bloom because growers are too anxious to cut ...

www.wikihow.com/Get-Irises-to-Bloom

How to Get Irises to Bloom. Irises (Iris spp.) come in a variety of sizes, shapes, flower colors and blooming season. If you have irises that are more than one year old and they are not blooming, there are a few possible causes which can...

www.hunker.com/13427052/how-to-get-an-iris-to-bloom

Irises (Iris spp.) flower in early to midsummer, producing multiple blooms on each stalk. They grow in U.S. Department of Agriculture plant hardiness zones 3 through 9, depending on the variety. Irises usually bloom with no help from you, but problems with the growing site or overcrowding can reduce flowering.

homeguides.sfgate.com/care-iris-plants-after-bloom-40163.html

Removing the spent flowers from iris stems encourages new flowers to form and keeps the plant from going to seed. Remove yellowed or browned leaves during the season and cut off flower stems to ...

www.reference.com/home-garden/long-irises-bloom-772f97af5320047a

Planting a varied selection of early blooming, mid-blooming and late-blooming iris species can extend the overall blooming period up to eight weeks. Irises are considered one of the easiest flowers to grow as the hearty blooms can withstand inflexible grasses and weeds. Irises bloom best in well-drained soil and direct sunlight.

www.hgtv.com/design/outdoor-design/landscaping-and-hardscaping/reblooming-irises

Reblooming irises, also called remontants, may not reliably rebloom every year, possibly due to vagaries in the weather, and sometimes due to lack of nourishment. Whereas many gardeners do little with once-blooming irises other than weed the bed periodically and divide them every few to several years, rebloomers could use a little extra help.

www.bhg.com/gardening/flowers/perennials/how-to-grow-reblooming-irises

When summer's lush greenness gives way to the sunset hues of autumn, you'd expect the garden to overflow with asters and chrysanthemums. But bearded iris? How did this flouncy flower of spring transform itself into an autumn beauty? Obviously, these aren't ordinary irises. These are reblooming ...