Mine were totally overgrown in their little pots so I had to separate them out. Of course, some did not make it, but others are doing fine and getting much bigger. I have some of the pots in our sunroom, which isn't that warm since it's cool outside and the new little plants are doing just fine in there, so they can take cool weather. I realized, too, that we had some regular petunias growing in a pot from last year, so I'll have to be cautious that the two don't cross-pollinate.
We are looking forward to seeing how this plant will do for us in terms of hummingbird attractiveness.
Kathi and Michael Rock