Best Planting techniques?

I got some decent purple power feminized, and I'm trying to figure out how to plant them.
I think I'll dig a couple of four square foot patches that are about a foot deep, and then fill it the bottom with gravel for decent drainage, and fill the rest with some organic potting soil. Does it sound like a good plan? How many plants do you think id be able to fit per patch? anything helps, I really don't want to fuck this up.:weedpoke:
thanks in advance. This is my first grow ever.

Sounds fine, gravel not neccessary though unless the soil in the area is very clayish. And go with garden soil instead of potting soil. One plant per hole. And You're getting kind of late, but we're still fine. I started late as well. Good luck, man.