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Message: [QUOTE="alp, post: 114404, member: 4658"] Just watched The Beechgrove Garden in which Chris Beardshaw showed how to divide iris. He says that the rhizomes should be at least 2 inches long as the plant needs this much as it fuels any future growth. Pot them up instead of growing outside. 25% grit and 75% garden compost. Mixed well. Then plant the rhizomes a bit deeper and I would suggest trim the leaves in a fan shape and put the pot in a hot and sheltered places. I would opt for a south facing border under a shrub and yet the iris will get the sun and he says it should be planted deeper i.e not exposing the rhizomes. Water it very well. Once roots have developed, you could remove the top soil. ( I add this) to expose the rhizomes. I myself have a big clump of rhizomes sitting on a garden compost. It's not clay, but very moist and free-draining. Already it has several new bulblets comiing up. Will show you these tomorrow. I have 2 of these. [/QUOTE]