OG Kush - Royal Queen Seeds

I'm growing one right now and it's a stretchy one like a sativa as well. I'm trying to LST it but it's not easy. I didn't expect mine to make it because I gave up on it after 3 weeks of NOT growing any taller than 2". My wife kept it alive and now I've re-established interest in to keep it going. So none-the-less it's been 2 1/2 mnths. now and she's just into the second week of flowering and going strong as F**K! Did you trim those plants while they were still growing or do you do that just right before you harvested?