No!

I agree, good luck Sterra.

There's nothing like a simple straight forward answer! Thank you, I will get on with it.

These propagate so easily and there clumps all over my garden now -- and covered in bees. I usually pull a bit off at the root and replant it.

Cheers Merliln! they do indeed root readily. I've a few rooted in water indoors but was checking whether there was still time to just bung in a few outdoors! I was just hoping that trying to root some outside would be OK so late in the season. In case you're wondering why I need so many, I'm trying to make the garden more labour saving and plan to make a small "hedgelet" with them down one side of a narrow border.