Yes, I read they are for stuff that is in the soil, because I wanted to buy them for slugs, but slugs are not in the soil, just all over it. LOL.
Gerry, I have never purchased tissue culture, but I got a bunch of liners when I got started and did a raised nursery bed. I did not protect them from the temps because I read that they need a cold spell. In this area we do not even mulch for winter because things would rot if we did. It's just too wet.This past week we got about 3 inches of snow followed by a small nor'easter which brought about 3 inches of rain and my yard is mud. I can see I have lost several daylilies. I have a lot that are sprouting but others seem to be dead. The hostas are in a better area, I think they are ok. But the new ones I bought are still in pots and I am worried about them. Time will tell.