transfer bulbs - Knowledgebase Question

McDonald, Pe
Question by barnes177
September 21, 2010
when is the best time to move iris bulbs? Is there something special to cover them with? Thank you for all the information that you have given me over the summer.


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Answer from NGA
September 21, 2010

0

Glad we've been helpful in the past! Irises can be dug and divided, then replanted anytime from mid-summer through the fall months. Iris is a rather undemanding plant, but there are a few basics you should provide to ensure healthy, happy plants. Cut the flowering stems down as soon as the flowers fade, but allow the foliage to remain. Divide iris beds when the rhizomes become crowded (usually every 3-4 years). This provides a good opportunity to amend the soil with organic matter, which will help it retain just the right amount of moisture for your plants. Dig up the clumps with a garden spade and separate the rhizomes. Then break away the ends of the rhizome and replant them, discarding the old center of the rhizome. Before replanting you can cut the fan of foliage down to 4" or more (for ease in handling). Dig a shallow trench and lay each rhizome in the trench, spaced about 6" apart, with the ends pointing in the direction you want the new growth. Cover with an inch or two of soil and water the bed well. Next spring your renovated iris bed should bloom with great enthusiasm!

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