@aspenhill Can you tell me what zone you are in & what area of the country?

Oops, I didn't scroll all the way down the page to see that.

I've never been much of a collector, but I love iris and peonies and it seems as if over the years I've gotten more into that...especially the iris.

Thanks for the info on snowdrops "nivelis" I think that is the problem: the "galewsii (??)" are not spreaders.