Discard any segments that are mushy or riddled with holes. Keep only the ones that are firm, dry and have roots and a fan of leaves attached. Separate healthy rhizomes into segments with one fan of leaves and several feeding roots. Transplanting iris successfully requires you to cut or break the small rhizomes away from the larger mother. It is time to start cutting back your Irises. - Gardening Know How Questions & Answers. Division is rarely necessary for Siberian irises. Pruning back the foliage in autumn allows the flowers to become more visible. Iris is a super tough, drought-tolerant genus of plants, with many species, that do fabulously well in Central Texas gardens. Do I leave my Siberian iris alone through the winter, then cut them back in the spring when new growth starts to show, as I've done in the past, or do I cut them back now? Siberian Irises should be fed with a good, all-purpose fertilizer in early Spring and then again immediately after they have finished blooming. You should divide your clumps before they reach that point which is unhealthy for them. Size. Their handsome foliage is attractive all year, even when the first frost turns them a rusty red-brown, although we recommend trimming back the foliage in late fall to discourage pests from overwintering. Dig mature iris plants in the spring or early summer after they bloom or in the early fall, well before frost threatens. The show begins w… Divide Siberian irises when clumps become crowded or when flowering decreases. Today, of course, everything is dominated by our oversized, “bigger is better” passion for the tall Bearded Iris, also called German Iris (Iris germanica) . In the Fall, cut the foliage back close to the ground after it dies back. Siberian irises like soil that has some humus, so add some compost, decomposed manure or leaf mold if your soil is lean or … To ensure a quality show of blooms, Siberian Iris should be divided every 3-4 years. Noteworthy Characteristics. Unlike bearded irises, they are seldom bothered by the iris borer, soft rot, or leaf spot. Do it about twice a week. By combining different types of irises, you can have them in bloom from early spring right into the summer. Outdoor Beds Find a location where the soil has an average amount of moisture, or in warmer areas it can even be a bit wet like on the edge of a pond. Pruning should be limited to removal of the damaged and dead foliage during autumn or in early summer. Repeat this process throughout the growing season to keep the stand looking tidy. Immediately after the stems are cut, place your iris in a clean, deep vase of warm preservative solution (about 100 degrees F). Cut back the flower stems after every flower bud has opened and finished blooming, removing the stem near the base of the plant. Replant the divisions immediately back into the bed or into containers. In shifting daylight, Siberian iris leaves may reveal a slight bluish green cast. You will notice that your iris clumps expand outwards each year until eventually the centers stop blooming. There are few species of iris that bloom twice a season, to help generate this second flowering it will be important that once the flowers wilt cut the flower stalks from the base. They bloom much later than the tall bearded irises, extending … Currently being bulked up in the Kitchen Garden. Trim out any dead or badly damaged leaves. They are not immune to the iris borer in those areas where this pest gains the disgust of iris growers. Prune back the entire iris plant to within 6 inches of the ground after the foliage begins to yellow in fall. Planting dwarf iris can be done in spring or fall. Most of the more than 300 species worldwide are hardy throughout the U.S. and are widely adapted to various soil and sun conditions. Arching, narrow, grass-like, linear, blue-green leaves form a vase-shaped foliage clump to 2’ tall. 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. Tall irises 1. Video of the Day Water to which a good floral preservative has been added is the best solution in which to arrange fresh cut iris. If you would like to rework the bed after the irises are removed (recommended), wet down the irises and Plants in the Siberian iris group are chiefly of hybrid origin, primarily being derived from two blue-flowered Asian species, namely, I. sibirica (central Europe to northeastern Turkey and southeastern Russia) and I. sanguinea (Russia, Korea and Japan). Here's an article with general care information: https://www.gardeningknowhow.com/ornamental/bulbs/iris/growing-siberian-iris.htm 3. Using it as recommended will provide additional days of vase life. Cut back the foliage of both bearded and Siberian irises to within 6 inches of the ground. Divide the rhizomes, which are underground stems, after the plants have finished flowering, but no later than August. And they’re virtually indestructible, making them the perfect plant for both beginning gardeners, who need some successes to boost their confidence, and more seasoned folks, who need at least one or two garden beds to be easy-care. Discard the old rhizomes. Cut the leaves back to six inches. How to Divide Siberian Iris. Spring is the best time to divide and replant your iris. Leave the green growth intact as this is crucial to plant survival. Here we provide further tips on growing and caring for your Siberian Iris. After blooming, cut down the bloom stalk. Then, cutting off all leaves an inch or two above ground level is recommended. January 29, 2019 If you love Siberian and bearded irises, you have to give their Japanese cousin a try. Cut back the dead debris in late fall or early spring. 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