Plant age in weeks, when do you start counting?

yes

 

I dont count. If I do I usually question when the breeders start counting for their advertising purposes lol.....

 

Autos day 1 that they stick their head up. Photos u count from when u see flowers. Veg time doesn't count for much

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I think it might be more instrumental for you to count nodes during the veg stage, and also gauge plant development by the breadth and height of vegetation relative to its container. Remember, the roots roughly mirror what you see happening above.

 

There's a minimum amount of time from germination that plant just isn't old enough to bloom, but the "ideal" is going to need to factor in the plant's genes (is it typically tall or short), the size of the pot and root structure, and the height and intensity of the lights. You want to make sure that when they're done stretching they're as large and healthy as possible while still remaining at an optimal height below your lights.

And, to be frank, I have barely more experience than yourself, I'm just a couple of months farther along in my first grow than you are now. I could take guesses for you, if I knew all those factors, but they would be based on my very limited amount of experience. So please take my advice in that light!

 

One month with good lights minimum. All depends on if u are inside or out. What size pots too

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