How many weeks in does it have to be to start force flowering

you should be flowering naturally soon enough, unless you have the plants in pots, ant their easy to move around, i wouldnt bother force flowering

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I grow only tomatoes and for my personal use. Any inference otherwise from my posts is completely false.

some ppl start flower soon as it sprouts

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I would wait until they are at least 10-14 inches tall. You should get a nice oz out of each one. But there are variables at play here. So thats just ballpark.

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From seed.

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I Brake For THC

Sure you can 12/12 from seed, but this ruins your yield because a plant still can't flower unless it's mature, regardless of what light cycle you have it under. If you're just wanting to make budsicles, then 12/12 from seed is for you, but if you're wanting to grow larger plants vegging until it is mature is almost a necessity.

12 in tall or as soon as pre flowers start showing dont flower until the pre flowers are out. the preflowers are an age thing and u need the plant to be some what mature or old for them to flower with a proper yield.

thanks for the replies

I forced my girls into flowering a month in to veg.. Now there doing great at 6 weeks..

Mine are 3 weeks old and i just started last night my 12/12 cycle