What do you think contributes more to the highest yield, veg time or full flowering time? Anybody have experience with this?

I'm about to start a crop that I need finished in October. My strain takes 8.5 weeks. Looking for some advice.

If yield is of primary importance and you had to choose between vegging 2-week-old rooted clones for only one week, but taking the crop a week early OR not vegging at all, going straight to flowering, but letting the harvest run it's full length...which would you choose?

I have a hydro set-up, 1000 watt HPS, in rockwool, growing OG Kush that I always top around week 2 of flower to get several colas.

I'd top them before you switch them to 12/12 and start asap. Most plants I've grown pack on some serious weight during the last two weeks of flowering.

Thanks Satch! Why do you top before switching to 12/12?