How much larger can a plant grow when switched to 12/12?

-I'm trying to figure out how big I wanna build my 18/6 & 12/12 grow tents. Iv heard that the plants can 2x and maybe 3x in size when put into 12/12? Is this true, will they grow that much more?

Thanks for the help guys

You bet it's true, double or triple.

yup stretch 2-3ft....dual spec bulbs can cut it down a bit

That is correct, by the end of the stretch phase of flowering they should be 2-3x the size they were when put into 12/12.

This means I have to account for that when I'm choosing when to put her in to 12/12 right? If my grow tents height is 5 ft then I Should only veg her to a height of 2ft at most?

Thanks again

This means I have to account for that when I'm choosing when to put her in to 12/12 right? If my grow tents height is 5 ft then I Should only veg her to a height of 2ft at most?

Thanks again

sativas generally stretch more than indicas, topped plants usually stretch less than untopped plants. if you have a single cola plant, i would flower at about 18 inches.

my plants were just about 20" when i put them under a 1000w hps for flowering. they are now almost 4 feet tall, so yeah, they do grow a bit.

jay3562 said:

This means I have to account for that when I'm choosing when to put her in to 12/12 right? If my grow tents height is 5 ft then I Should only veg her to a height of 2ft at most?

Thanks again

Click to expand...

depends on the space, number of plants, grow strategy, horizontal area. if you plan on doing no topping and no training then yeah, about 2 ft is where i'd start flowering.