I let my leeks go to seed and transplant the seedlings, with good results.
I now have "wild" leeks growing strong in the parsley bed, the compost heap, but the "proper" leeks, from bought seed, are all infested with leek moth maggots. Methinks Nature knows best (my "wild" potatoes are always earlier and better than bought ones too)

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~ What do I think of Western civilisation? I think it would be a very good idea ~ Gandhi