Do you start zinnias from seed indoors?
I have done this in the past but had a hard time getting the seedlings to gain size very fast. The last two years I waited until after the last frost and started them in six packs outside, which worked very well. But, that meant it was longer before I got blooms.
So, do you start yours inside? How early? What temperature do you keep them at for good growth? Anything else that might affect their growth rate: water? light? etc
FYI I will be growing Profusions, Zaharas, Benary Giants, and Zowies.