5 weeks no buds

You can try increasing the dark time by a little more, like a half an hour. Revert to 12/12 when they are in flower.

 

5th week of bloom?
or 5th week of veg
I veg for 8-10 weeks dont see hairs till week 9 or so usually

 

If that's one plant on the 5th week of veg, I want that regimen lol

Edit: Just reread, I'm an idiot lol

 

did you boost your nutes when you flipped to bloom ?

 

yeah you need to do some kind of PK boost when you flip to help promote buds
I am close to 800PPM my last week of veg and at 1500PPM the week before micro flush

 

Next set leave them in full dark for 36 hours the day you flip them. It usually bring on a faster flowering.
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Flowering Marijuana And Its Light Cycles


In nature, marijuana plants start to flower in the late summertime to early autumn. When the days start to be shorter and the nights become longer, flowering signals are triggered by photoperiodism, which begins the flowering process and tells the plants that autumn is near.

The female marijuana plant redirects its energy from vegetative development to flowering in order to draw in plant pollen and generate seeds. By manipulating the hours of the night, indoor and outdoor growers can postpone flowering marijuana indefinitely or begin flowering whenever they want.

The conventional method to sustain vegetative development is to keep the light on the plants between 18 and 24 hours each day. The vital aspect is not the hours of light, however the hours of darkness.

With six hours of darkness or less, the plants will continue to grow in its vegetative development as if they were experiencing an extensive summer season.

When it is deemed time for the flowering process to start, the light pattern is changed to 12 hours on and 12 hours off. Increasing hours of continuous night signal the plants to respond as if the Autumnal equinox is approaching and begin to flower marijuana.

By using these light patterns, you can regulate when your marijuana plants flower.



The Science in Layman’s Terms
Cannabis plants are described as long evening or brief day plants because they need a long period of darkness to cause the plant’s hormones to change from vegetative growth to flowering.

These light receptors are color pigments in the fallen leaves called Phytochrome Red (PR) and Phytochrome Far Red (PFR). These pigments acquire their labels from the types of light they take in.

PR absorbs red light in between 660 and 760 nm and PFR takes in red light between 760 and 800 nm. These two pigments chemically react to the light and trigger the plant to flower or not.

In cannabis plants, the typical presence of PFR turns off the flowering signal. The degree of PFR is what you can manipulate by adjusting the photoperiod and PFR is quickly created when plants are left open to light which contains far-red wavelengths.

When there is light, the PFR and PR keep a balance. When the sunlight decreases, or the lighting schedule changes, the darkness slowly switches over from PFR to PR. As a result of this, PR levels gradually enhance and the PFR gradually lessen throughout the dark duration.

When the light returns, or if a small amount of much red light interrupts the dark period, the PR immediately changes back to PFR. If the plants lack light for long enough, the PFR will reduce beyond the tipping point.

This reduced level of PFR indicates to the plants that autumn is approaching, and the marijuana begins flowering. Basically, the existence of PFR, due to long hours of light and short hours of darkness, keeps the plants in the vegetative phase.

If the plant experiences sufficient hours of darkness, many of the PFR revert to PR; and the reduced degree of PFR indicates the plant hormones to begin flowering.



The Best Ways to Start Flowering Marijuana
Due to photoperiodism, you can easily cause marijuana plants to flower simply by changing the light patterns – lowering the light from 18 hours a day to just 12 hours each day.

Once again, exactly what is actually important to the plants is changing from six hours of the night, or much less, to 12 hours of darkness.

Within two weeks of switching over the light cycles to 12-on and 12-off, you ought to see little buds beginning to form. This means that any sort of light reaching your plants during the dark period may screw up the marijuana’s flowering process.

Because of this, one should never ever – not even for a moment – enter the grow area when the lights are turned off in the 12/12 cycle. Prior to you making the change to a 12/12 light cycle, you should make certain your grow space has no light cracks.

Enter the grow room while the lights are out and close the door behind you. Wait approximately 15 minutes for your eyes to readjust entirely, then look around and ensure no light is getting in the room.

While converting to a 12/12 light pattern will cause flowering, there is a trick to jump-start the procedure. In between the change from an 18/6 to a 12/12 light cycle, allow your plants sit in uninterrupted darkness for 36 hours.

This will trigger the PFR to go down significantly, providing the plants a strong signal to blossom.
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BNW

 

What To Do When Your Marijuana Plants Won’T Flower?
What To Do When Your Marijuana Plants Won’T Flower?


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