Wait until late August to divide iris. Cut foliage to 4-inch fans, dig clumps, discard dead/borer-infested rhizomes (burn or trash, don't compost), replant 12 inches apart. Dust cuts with antifungal powder. Repeat every 3 years.
Oleander Disease Resistance from Cuttings: Theory Has Merit
Fertilizing Daffodils and Iris: Less Is Often More
Dividing & Repotting Overgrown Cymbidiums
Transplanting & Pruning a Leaning Tree Rose
Iris pseudacorus: Yellow Flag Iris for Wetlands and Water Gardens
Pruning Orchid "Stocks"? First, Know Your Type
Transplanting Wild Maple and Elm Seedlings: Direct Plant Beats Pots
Transplanting Venus Flytraps and Sundews: They're Tougher Than You Think
Transplanting Shrubs and Bushes During Porch Construction: Autumn Timing and Pot Storage
Fall Transplanting Guide: Eleagnus, Bananas, Bulbs, and Amaryllis
Tropical Iris Look-Alikes: Neomarica and Dietes for Warm Gardens and Indoors
Dividing and Transplanting Oriental Poppies: Timing and Technique
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