Iris - Knowledgebase Question

Mitchell, SD
Avatar for misty66
Question by misty66
September 4, 1998
I live in zone 4. I have a large Iris bed and would like to redo it. Can you tell me how late I can dig up and replant the iris? It has been so hot and I cannot work in the heat, but I would not like to lose the iris.

Answer from NGA
September 4, 1998
The typical first frost date in your area is the end of September, so you should divide and replant your iris as soon as possible, so they'll have a chance to settle in before winter comes. Carefully dig the rhizomes out, cut or break off the ends to replant, and discard the old centers. Cut the foliage and the roots back to about six inches. Then amend the bed with plenty of organic matter and place the tops of the rhizomes so they're just a the soil surface. Water them in well. To help keep weeds down, lay 3-4 inches of mulch over the top of the soil surface.

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