Guy's I'd really recommend that you not use seeds for an outdoor show... I've tried this a number of seasons ago (when I couldn't get the clones) and I found that it's almost impossible to sex and remove the males in time to not fert a bunch of the females. The other thing is that you want to use the space efficently, and why would you want to use a signifcant percentage of your space for plants your going to nuke down the road? Be smart, use the clones first! Best of luck!