4 week switch to flowering no Bud

I have 2 height trees about 70cm veg time 3 weeks plants grow very fast and strong when I reached my desired height I turned to flower with light schedule of 12/12, 4 weeks the plant only extends and develops its leaves but there are no signs of flowering I have tried the nutrients npk 10-55-10 combined with AN Sensi to bloom but still have not shown signs of flowering.
There was also no sign of a male, no light leak I checked very closely.
I am trying to turn off the light for 36 hours.

Led Mars pro II epistar 160 led 900w
Nutrients AN sensi bloom...
My box 100x100x200
Temp 27~28c on light
Seeds I received it from a friend and do not know the name

arakawa said:

I have 2 height trees about 70cm veg time 3 weeks plants grow very fast and strong when I reached my desired height I turned to flower with light schedule of 12/12, 4 weeks the plant only extends and develops its leaves but there are no signs of flowering I have tried the nutrients npk 10-55-10 combined with AN Sensi to bloom but still have not shown signs of flowering.
There was also no sign of a male, no light leak I checked very closely.
I am trying to turn off the light for 36 hours.

Led mars hydro 900w
Nutrients AN sensi bloom...
My box 100x100x200
Temp 27~28c on light
Seeds I received it from a friend and do not know the name

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mars does pretty well with veg but pretty bad with flower its prob the light mate give it some time and they will take off have u check for male sites just in case ?

Are you sure you don't have a auto there, as some simply won't flower until they are good n' ready, then there are even some that I have personally grown that wouldn't ever flower, little bitches. But yeah, give it 48 to 72 hours of darkness to see if you can kick-start it into flower, but before you actually do that check that you don't have any light leaks, and if you are using a timer, check it to see if it is working properly!

piratebug said:

Are you sure you don't have a auto there, as some simply won't flower until they are good n' ready, then there are even some that I have personally grown that wouldn't ever flower, little bitches. But yeah, give it 48 to 72 hours of darkness to see if you can kick-start it into flower, but before you actually do that check that you don't have any light leaks, and if you are using a timer, check it to see if it is working properly!

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I certainly do not interrupt the light because 1 tree has signs of flowering It that is not possible if there is light leakage or interruption.
I think it's not automatic because the overall size, branches, leaves,stump are quite large and eat a lot more than auto
My tree still shows signs of stretching and no signs of flowering.
It stopped at pre flowering has been for weeks and has shown signs as shown in the picture The tree still grows tall but no white beard

You sure the timer isn't doing it's own thing and letting the light run some at night?

You could switch to a 13 off 11 on schedule.

You are saying it's been on a 12/12 schedule for 4 weeks?

The good news is that it appears to be female, unless it develops hermaphroditic tendencies later.

Renfro said:

You are saying it's been on a 12/12 schedule for 4 weeks?

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yes it has been 4 weeks If the problem is in the timer 1 plant will show no signs of flowering There is little white beard and it is not clear.

I would switch to the 13 off 11 on schedule to see what it does.

Ok so you vegged for 3 weeks and flipped them? It can take 6-8 weeks from seed for a plant to be mature enough to bloom. Has nothing to do with nutrients or your light spectrum. So if these are 7 weeks old from seed and preflowering as they appear to be you should be seeing pistils emerging soon.

Richard Drysift said:

Ok so you vegged for 3 weeks and flipped them? It can take 6-8 weeks from seed for a plant to be mature enough to bloom. Has nothing to do with nutrients or your light spectrum. So if these are 7 weeks old from seed and preflowering as they appear to be you should be seeing pistils emerging soon.

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I don't count the time since the seed germinates.
When the plant reaches the desired size I turn to flower.in 4 weeks 12/12 trees were 3 times taller and bigger.
Currently 1 plant also in my box has turned to flowers but only a few small white hairs under the branch there is no white hair on the main bud.
I turned the lights back on after 36 hours and turned off the lights and waited for miracles to happen
I am on the 11/13 light schedule and I have done everything I can

Renfro said:

I would switch to the 13 off 11 on schedule to see what it does.

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Did you mean 13 o'clock light 11 o'clock in the dark ?
Currently, one of my plants has shown signs of flowering. Does this make it reveg ?

arakawa said:

Did you mean 13 o'clock light 11 o'clock in the dark ?
Currently, one of my plants has shown signs of flowering. Does this make it reveg ?

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13 dark
11 light

Richard Drysift said:

Ok so you vegged for 3 weeks and flipped them? It can take 6-8 weeks from seed for a plant to be mature enough to bloom. Has nothing to do with nutrients or your light spectrum. So if these are 7 weeks old from seed and preflowering as they appear to be you should be seeing pistils emerging soon.

Click to expand...

Yep plants hadn't reached sexually maturity so when you flipped them they kept maturing but didn't flower immediately. Like he said stop screwing with light cycles, nutrients, etc. Give it time and it will fully mature. Your just gonna herm it out messing with all that other stuff.

45 days of veg min. Plants will grow 1/3 more after you switch the lights back to 11-12 hrs of light. Heed the warning about light leaks and screwing with light cycles. Be patient and check daily. Sativa's can take a while before sexing. Typically they will show on the lower branches (3rd or 4th from the bottom) first.

I have read a few articles in the past about not allowing enough time in veg has an effect on thc content of the plant.

What do you guys think I should do with this POS? It's meant to be Stoned Henge by High Altitude seeds. Advertised as a short, bushy, heavy flowering plant. Should I rip it out and call it a waste of time? The thing has been on 12 hrs for 8 weeks and it hasn't done jack towards flowering properly. The other 2 ppics I took are of ones that were still seeds when it was 2 ft tall!!! Seed banks lie. Also I've noticed in here that some people don't remove their meta from pics. I can get the gps coordinates on google maps. Please ppl use an apk editor.

Looks like you are growing a sativa strain. Be patient they take longer than Indica strains. You got this much time invested whats a couple more weeks.

Growth on sativas happen near the end of flowering. They will explode and fill in soon. I grow a Hawaiian strain that always flowers late but worth the extra 2 weeks. I have better luck with HPS lights on sativa strains. 1000w during veg and in the middle of flowering i cut it back to 750w.

Thanks everyone
My plants are beginning to enter the flowering stage