Bearded iris need the same good care that most flowering perennials require: deep watering in dry weather, regular weeding to reduce competition for moisture and nutrients, and fertilizing once or twice each year with or similar fertilizer. After the first hard frost in fall, cut back the tops of iris plants to about six inches and clean up any remaining iris debris.
Established plants need to be divided every third or fourth year or whenever the clumps become crowded and flowering decreases. This is best done in the summer after flower stalks have died back. Use a spading fork to lift the entire clump, being careful not to break the fat feeder roots. Wash off the soil and use a sharp, clean knife to separate the rhizomes into individual fans.
Discard the bloomed-out center portions and use only the vigorous healthy fans from the outside of the clump. Cut back the leaves to about six inches and trim off any broken roots.
You can label these divisions with the cultivar name and store them for a few weeks in a cool well-ventilated place before planting, if you wish, or you may plant them outdoors immediately.
Please make note of bud count, branching, purple based foliage and bloom time, etc. Because these are affected by climate, note date, year and geographic location and write these and other comments in the comment box below. Attachments 13 Attachments Topic revision: r14 - 16 Aug , Harloiris.
Log In Register. It may be necessary to plant the rhizomes in raised beds at least 6 inches high to obtain proper drainage. Iris will grow in many soil types but a light, loamy soil that has been amended with organic compost is preferred. New plantings will also benefit from a generous application of bone meal or moderate amount of triple super phosphate in the root zone inches below the rhizome.
Bearded iris need the same good care that most flowering perennials require: deep watering in dry weather, regular weeding to reduce competition for moisture and nutrients, and fertilizing once or twice each year with or similar fertilizer. After the first hard frost in fall, cut back the tops of iris plants to about six inches and clean up any remaining iris debris.
Established plants need to be divided every third or fourth year or whenever the clumps become crowded and flowering decreases. This is best done in August after flower stalks have died back. This is also the time plant new irises. When dividing, use a spading fork to lift the entire clump, being careful not to break the fat feeder roots. Tall Bearded Candy Dust.
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