Can't say for sure because you don't provide any location or garden zone info and that is crucial info when you post questions.

So it depends on how early you started them indoors and what your climate is. May 1 isn't very early at all. Try late Feb to early March next year if you want guaranteed blooms the first year.

Spacing is 12" minimum, 18-24" is better.

Dave

I'm in zone 7a...I guess I'll just have to wait and see.