It has nothing to do with the time you give them. It completely depends on the height they reach before you throw them in to flowering. A good rule of thumb is to let them grow between 10 inches to one foot. Any larger and your going to run out of room quite fast. Any smaller and your yields will suffer greatly as iv learned the hard way. I wouldn't waste my time with preflowering it just adds on more time till harvest day. Just pull em as you go. They could reach a foot in as little as 5 to 6 weeks or as long as 8 to 10. It all depends on the genetics that were instilled in the seed, and even if you have the same strain each seed will act differently and grow at its own rate.
thanks i really dont what preflowering is, but we will let them go for 8 wks and i have two that will be nine wks by then, so all are going into flowering together they are almost 3 wks and 4wks old now, also i have 13 plants undet a 400hps lamp i know that wasnt enough so we got 2 grow flor lights 75watt each and put them on opposit sides of wall they r in a closet, is that enough light![]()
Sorry i guess the almost 20 years of growing experience i have isn't really relavent. Sure go ahead throw your plants into flower whenever you want...I guess i'm not as smart as i thought i was, or the fact that book after book i read didn't say the same thing either, or that all the growers i have grown with are full of shit.
Don't mean to sound harsh...but the fact of the matter is...letting your plants go that long will ensure MAX results. I have come to acknowledge that letting your plants fully mature will produce better stronger tastier bud. AND THAT'S THE FACTS!!!
I think you all are missing the point i'm making. TOP the plant then you won't have to worry about the height issue.
SouthernOregonOrganic is correct. the amount of time vegging is irrelevant. If you plan on vegging for two months you better have A LOT of room for vertical growth. I vegged my last plants for 30 days and they were nearly 4 feet tall by the time i harvested. plants at least double and sativa or sativa-heavy hybrids can more than triple in size after switching to 12/12 so be forewarned.
I'm not impugning your experience nor your accuracy. You are absolutely right, for max yield results there is no substitute for longer vegetative times.
Thanx e-mail. I was starting to feel that i was being told i'm full of it...lol.
I only want people to grow the biggest baddest weed they can, and that's through proper growing. That's why you find so many people growing outdoors.