Hey so my plants are 7 wks above ground. Would that put them at 4.5-5 wks of veg?
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Not enough info at all bud…
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I look at it in terms of the photoperiod. If the photoperiod of the lighting is facilitating vegetative growth, then that’s veg. If the photoperiod is facilitating flowering then it’s flowering.
To me, your plant would be at 7 weeks veg having started from seed and some of that “veg” time was in the seedling stage. Not sure how technically sound that is, but that’s how it makes sense to me. Much love
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If they are 7 weeks above ground, they are 7 weeks in veg is how I do it. I haven’t heard anybody say the yhave to so many inch tall. Maybe somebody can you if it is first single leaves, the triple leaves.
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I am also confused by this question.
If they are seven weeks above ground and are photoperiod plants, they are seven weeks into veg imo.
If they are seven weeks above ground and are autoflower plants, I’d hope they are well into flower by now.
Some more information about your grow would be extremely helpful at this point. 
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I didn’t mention height. Ok they are photo. I have read and heard some people don’t count seedling as veg time in their count. That didn’t click with me because I wasn’t sure when the line for seedling/veg was. That is so much easier for me knowing that’s excepted as well. I would say 7 wks myself but I guess anyone can reinvent the wheel if they try hard enough lol. Thanks question answered I believe.
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The period of growth between germination and flowering is known as the vegetative phase of plant development. During the vegetative phase, plants are busy carrying out photosynthesis and accumulating resources that will be needed for flowering and reproduction. Different types of plants show different growth habits.
From the experts
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Pictures or we can’t really help you… info works bit without seeing the plants, we’re blind leading blind
If you’re looking for 4-5 weeks you’ve got it, and they should be good to flower if they are the size you’re looking for. This will depend on your space and lighting, and considers that they will “stretch” up to (but usually less than ) double in size.
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I count veg from start of 2nd set of leaves
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Just flip the thing to 12/12 when it is half of you desired finishing height.
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Have they shown sex ? Or did you start with fems
They only 1 of 3 have shown sex. Male of course. The only reason I am asking is for nute schedule and to know about when preflowers should show. Some nutes have seedling for 2-3 weeks then veg then bloom.
Since I’m running some photo/regs as well. I am not going to flip them before they show preflower. Unless they just don’t.lol
Oh! You’re asking about a nutrient schedule.
What kinda nutes, and what type of grow?
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As far as I know it’s the flipping that triggers the preflower.
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No, preflowers appear all on their own when plant is sexually mature . See preflowers even under 24/7 lights.
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Not just nutes but so I know myself but it seems not to be a standard. I use mycos+ which is a seedling 3-0-0. Then ff trio soil. I’m getting bloom booster for this grow I think. So there isn’t an industry standard just whatever a person’s personal preference. I get that seedlings are technically in veg as soon as is above ground. Just some people and sites differ which isn’t unusual just curious if there was a standard.
@420noob it’s based on the length of the DARK period, unless they are Auto-flower seeds.
At least 9 hours of darkness but 12 light/12 dark is the most common indoor “photoperiod” to flower.
So figure out how long your days & nights are, then watch it transition naturally or force it by controlling the photoperiod. 
??? I understand the transition is due to light changes that wasn’t the question. Thanks for sharing though.
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Ok, I think that you’re getting less than desirable responses because your first post is confusing and your other posts do not include a direct question.
Let me take another stab at it.
Are you wondering when to switch to Bloom nutrients? If so, there’s two answers to this.
When using dry amendment or organic fertilizers, I would say at the first sign of flower, possibly even a little before. If you are using liquid/synthetic fertilizers, I would say not until at least a week after you’ve identified preflowers if not later.
The reason being that one becomes more readily available than the other. There can also be a difference in this schedule depending on the type of grow(i.e. soil, coco, or hydro)
Idk if this is what you’re looking for, or even close. Either way I hope someone can find it useful.
Let me know. 