corkscrew shell vine

I overwintered mine in the greenhouse and it kind of died off but came back. It is growing by leaps and bounds but no blooms! What am I doing wrong or not doing?

Are you talking about the snail creeper? (or corkscrew vine)...if so they form a tuber type thing underground.In some places brcause of temps they may take untill Autumn to flower.If it is in a pot I would move it to a warmer place....a little at a time if it has been in shade.Here it covers a lot of space very quickly....and you get hundreds of flowers ...is your area a bit cool?

I've had it out since about the first of May and temps have mostly been in 80s and 90s.

I think you will see flowers as the temps start to go down in the Autumn. They fix their own nitrogen so go easy on the feeding or you will get lots of growth at the cost of the flowers. :)