How much taller will plants get after flowering?

Hey guys how's it going. I have a hydro setup and my plants have only been in veg for almost two weeks but not quite, they are about 15-18 inches or so right now and I think I have enough room for them to be no more than 3 feet tall full grown. How much taller will they get after flowering, will they double in size? If they do then do I need to flower them now even if they aren't showing pre-flowers yet? Thanks for your help.

Yes they will double or triple in size... And idk the answer to the flipong to flower question was wondering that myself haha good luck!

after flowering?

they are done

Are theu clonesor seed? Clones can flower immediately, seeds not. Also, whats ypur strain. A hard indica might only jump 50 percent while a hard sativa might jump 200 percent.

Heres a more specific part to this question. In what weeks of flowering do they stretch and at what week have they finished stretching? My plants are just beginning week 3 from 12/12 and have some nice buds. they have stretched a little bit but not a ton. It's White Widow. its probably about 14 inches now and was about 10 inches when induced. My Tahoe OG has gotten quite a lot bigger. still not doubled in size

Here's pics. they have definitely grown here they are now.View attachment 2055743View attachment 2055745 and here they are i believe on the day they were induced. if not the exact day its within 2 days

Look up low stress training or topping. "LST" you don't have to flower till ya want to.

it's like the first two or so weeks of flower when the plants will want to stretch, and like someone else has already said, the sativa / sativa dom strains will get much larger in size form the induction of flowering than say an indica / indica dom strain will..

you can pretty much bet on them at least doubling in size up to tripling for a more sativa dom strain from the induction of 12 / 12..

It's raspberry cough from seed, it's sativa dominant. So should I flower them now? Is it bad if they have no pre-flowers?

you can flower when ever you please alot of people 12/12 from seed i personally veg for 2 weeks then 12/12 because of space

i always like to wait to flower till i see preflowers, but that's just me, and plenty of people flower from seed, what is called 12 / 12 from seed..

you can always try some lst of super cropping on them if they get too tall.. lst is simply tying them down with some string or w/e so halt vertical growth, and is known as low stress training as it doesn't really stress a plant out the way that say supercropping is said to do..
with supercropping, you take the stem between your thumb and forefinger and squeeze it so that the inner wall of the stem breaks and the stem is no longer able to support itself.. it will now want to lay at like a 90 degree angle, and after you do it for the first time, you'll ask yourself wtf did i just do to me plants, lol, but don't fret, they will be just fine..
you can look on youtube for videos on both supercropping and lst if you're interested in seeing how they work, but if not, i wouldn't let them get too much taller before inducing flowering just to be on the safe side if you don't want to train them at all..

Lst is a great option too as stated above but ive always grown indica dom plants and ive always topped them at a young age while they where in 24/0 so they had time to recover and grow bushy then put them into flower after 2-3 weeks and lst the tops

some may double and even triple in vertical growth some will also grow quadruple the size in width so cage it or tie her up

Sativa's are known to stretch more in flower.

So a 60/40 like White Widow and Tahoe OG would be expected to double in size in proper conditions?

yes they will at least double in size the first couple of weeks or so and also get wider. also they will slowly get taller towards the end of flowering.

other than lst or supercropping there is also topping that you can do also it will make your plant shorter, make it produce more colas, and if you top it at a good point not too high you can clone your top and get another littler plant

As racer boy said, i also veg until i see pre-flowers, i have no idea on it's effects it's just what i do personally

2layz2p said:

Look up low stress training or topping. "LST" you don't have to flower till ya want to.

Click to expand...

This guy had already mentioned LST and topping....

you can go 12/12 from seed...However, the plant will still stay in a veg state till it is mature enough to flower, this is why people wait for pre-flowers. think of it as hitting puberty.

2 of the smaller plants look stretched a lot move the light closer and they double in size and have a look at this chart just in case u get any n p k promblems during flowerin.