Siberian Iris info - Knowledgebase Question

kalamazoo, MI
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Question by dfgquilter
August 12, 2006

Hi! When is the best time to transplant Siberian Iris that are about a foot tall?

Also, do they like bonemeal like other Irises do?

Thanks so much..... Dorian

Answer from NGA
August 12, 2006
I'd transplant in fall about 6 weeks before your first frost date. That will let the foliage store energy in the bulb for next year's growth. Yes, they like bone meal, which is a source of phosphorus, which promotes bloom. Put the bone meal in the hole and mix it with some soil. Phosphorus doesn't move readily through the soil the way nitrogen does, so it's best to place it in the root zone.

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