Rooting clones light requirements

I am on a pheno hunt and I want to take clones of my vegetative plants. I also want to flower those clones as fast as possible, so I can know what they are like. That way I can keep a mother in vegetative in order to take clones forever!

Will clones root while the light is on only 8 hours? That way they are finished really fast.

Or do I need to root under 24 hours of light for a couple weeks, then switch to the 8 hour photo-period in order to flower fast?

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I root mine under 18/6. I know you can under 12/12 if you want to see them flower faster.
A pheno hunt with clones is interesting. Each will be exactly the same so I am guessing you will pollinate them right?

OOps…Misread …PLANTS…plural…Lol
Nevermind.

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I did something like this a few years ago, I was attempting to grow cannabonsai plants, I just cut my clones and they went straight to 18/6 lighting until roots formed, potted them and put under 12/12 they started flowering just after the roots took hold somewhere around days. I used a cheap 32w feit electric led grow light from Home Depot for clones they seemed to love it especially when I turned on just the blue and white lights with red off.

Just something I did for the wife cuz she likes bonsai plants lol

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Let me clarify. I am growing from seed and I have a few different plants.

I want to find a mother to keep. I only need the best seed out of each batch of seeds. But the only way to know which seed is the best is to flower out each one, via a clone, while leaving the mothers in Veg.

I need to flower each clone as fast as possible! Then I will know which mother to keep and which ones to toss out!!!

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If they will root under 12/12, will they root under 8/16?

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I find a plant I like I just put it back under 18/6 and reveg it. Done it several times.
It does take longer but the results are the same. Longer because I can only grow 4 at once in the tent. Clones you could do a lot more of at a time. However in Missouri I’m only allowed 6 plants at a time in flower so if I was inspected it would be bad.

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Im sure they will. Might stretch a bit more.

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I know this works, but…

I can unfortunately tell you that re-vegging a plant after it has been put into flower is not a good plan. I tried that method… The mom’s flower from seed was phenomenal. I chopped her back, left some vegetation at the bottom and put the whole plant back into veg under 18/6. I then took clones from that “Re-vegged Mom” and did multiple runs with the clones. The look was awesome but the smoke was not the same quality as the mom when I originally flowered her!

So… I am now keeping my moms in Veg so I can always have a first generation set of Clones off of an unflowered mother. I will just keep cutting back the moms in the Veg tent.

But I would like the clone sample flowered as fast as possible. So I am going to put freshly cut clones, from each mom, right into an 8 hour on cycle.

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I have not had those results myself. The clones were always exactly like the mom.
But cannabis is an odd plant and nothing surprises me.
Hope it all work perfectly for ya.

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I’m curious for you to find out the best method of doing this. I think if I was going to try to accomplish this I would just give ‘em 12/12 the entire time, decreased light intensity to start with the light a ways away from them and gradually bring the light closer and increase intensity as they became more established. Just a thought.

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My grow guide for the RE-Veging.
And as advised terminal buds remaining, got light trim.
PNW going colder this week, so Both tents now, 18/6, opposite each other. Max lighting & warmth, for re-vegers and seedlings. ILGM seedlings in veg state (redundant) will be used for clones and 2023 summer outdoor grow. 2022 I mined for seeds. No more intentioal pollenating as 2022 summer.
thank you S-N and NK1 Good Clonig to you

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I spoke with a professional. He told me that clones will root under 8 hours of light. I will post my results later!

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Back in the 90s I used to do very well with the reveg thing, and had about a 80% success rate at it after harvesting about 3/4 of the the plant’s tops. These days I am lucky to get a 10% success rate. The difference being that I didn’t flush back in the 90s. It is hard to bring back a plant that you have just starved to death. Most often I can not get enough of a reveg to even cut a decent clone, let alone get the plant going again.
Likewise I have never had much better success with taking clones from a flowering plant. But maybe I am getting a little more dialed in on this though. I recently picked up some Root Riot plugs, they work very well without the ph issues of the peat pellets. I got the 40 cell tray of the Root Riot plugs, this enabled me to cut as many cells and plugs from the tray as I wanted to use. I started with cutting two out of the tray.
I cut these two clones from a Black Widow photo that was in about the 5th week of flowering. After putting the clones in the plugs with some root tone. I would just give them a mist of water on the plants and plugs daily, and let the plant dry until the next day. This is what I had after 10 days, of keeping the light at 10-15 DLI for 18 hours per day. This enough to keep the clones alive and healthy, but it not enough to let it try to grow. So this allows the clone to focus on rooting. During this time it is also slowly transitioning back to veg.



Here they are today, after 10 days in a solo cup of coco, and boosting the light level up to 25 DLI for 18 hours. This has put them back into producing new leaves. I am excited to finally have some luck cloning a flowering plant.

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Could not agree more on this one. Or better. Specifically; flower time.

I have keeper clones from 2006. The flower time is weeks faster now. I keep impeccable notes on everything in my grow logs.

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If you are doing large seed runs, it’s way easier to do a whole tray of bonsai seedlings. Then flower them out for selection. Chuck all the losers and keep the winners. They turn back around into vegetative plants way faster as little bonsai plants. Versus a big mother. Don’t let them get big root masses. Keep them in small pots until you’ve selected. 4” or beer solo cups.

It will save weeks on the revege time, like a whole month.:point_left:

Or go crazy and pollinate with the best boy. Those will reveg w seeds just as fast.

Experiment ended! I switched the flower room to 12/12 so I can constantly put little newbies in. But everything did root without issue. I did one week of 8 on/16 off, then switched over to the normal 12/12. I am on day 25 of flower now and it is starting to give off a wonderful smell!

Current Grow 12_2022