Light schedule for seedlings???

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Southwest420
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Light schedule for seedlings???

Post by Southwest420 »

Hi all just wondering if anyone can shed some light on this for me

Going to be starting some photo seeds off soon (last grow was autos)

And just wanted to know what sort of light schedule do you use for seedlings??

Any input is much appreciated πŸ€ŸπŸ™ŒπŸ’¨
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Re: Light schedule for seedlings???

Post by Glynne420 »

Hey up SW420.... for seedlings/vegging, some ppl use 24hrs light and some less... i always like giving plants a bit of a dark period so usually use a 20/4 light schedule until dropping to 12/12 for flowering...
It really is up to you and whats best for your situation etc.... as long as they get 18hrs minimum for vegging your all good.
Im sure others will be in to put their tuppence worth.

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Re: Light schedule for seedlings???

Post by Southwest420 »

Glynne420 wrote: ↑
Thu Jan 16, 2020 7:28 pm
Hey up SW420.... for seedlings/vegging, some ppl use 24hrs light and some less... i always like giving plants a bit of a dark period so usually use a 20/4 light schedule until dropping to 12/12 for flowering...
It really is up to you and whats best for your situation etc.... as long as they get 18hrs minimum for vegging your all good.
Im sure others will be in to put their tuppence worth.
Ahh I see, yh 20/4 sounds like a good place to start!πŸ‘

Also how long do you usually keep them in veg? Or is that pretty much personal preference too?πŸ€”πŸ™ˆ
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Re: Light schedule for seedlings???

Post by Nanook »

I use 24 for seedlings and change to 18/6 once out the propagator tbh.
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Re: Light schedule for seedlings???

Post by Southwest420 »

Nanook wrote: ↑
Thu Jan 16, 2020 7:49 pm
I use 24 for seedlings and change to 18/6 once out the propagator tbh.
How long would you keep in them propagator mate?
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Re: Light schedule for seedlings???

Post by Viz »

Different folks have different ways of doing stuff. Some like 24 hours lights on in the early stages, others prefer a 18/6 or 20/4 schedule. It does not really matter all that much I think, however I like my plants and the hardware I use (lights and stuff) to have a bit of down time. So I opt for the 18/6 light plan.

Depending what you are growing will determine how long you keep stuff in a propagator. If growing Auto seeds you want your seeds into the final pot and under your lights ASAP. Females or reg's it does not matter. Some plants I have force kept in the propagation area for five to six months, small pots and regular root trimming.

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Re: Light schedule for seedlings???

Post by Nanook »

Southwest420 wrote: ↑
Thu Jan 16, 2020 7:56 pm
Nanook wrote: ↑
Thu Jan 16, 2020 7:49 pm
I use 24 for seedlings and change to 18/6 once out the propagator tbh.
How long would you keep in them propagator mate?
Tbh I take the lid off when they hit the top.
The quieter you become, the more you are able to hear.

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Re: Light schedule for seedlings???

Post by GMO »

16/8 FTW

If ya dont need to run heating lights off, 16 hours lights on 8 off is super cheap. seedlings should have enough stored energy from the seed leafs to start making real leaves without too much extra light being added. the light we add helps control the plant shape as it forms imho

once ya have true leaves the amount of light matters more, before then its light intensity controlling plant shape
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Re: Light schedule for seedlings???

Post by Southwest420 »

Thanks everyoneπŸ‘

Will take everything on board and get started asap!😜

Has anyone here got any experience in using a wilma drip systems? Thinking of getting one as my first step into hydro
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Re: Light schedule for seedlings???

Post by Hmr81.5 »

I pop seed in towel them move to coco and keep under 24 hour light until the shoot comes up then switch to 18/6.
That my way anyways but I'm ew at this so it may change lol
Whoever said the best things in life are free blatantly grew their own pot
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Re: Light schedule for seedlings???

Post by Marcus »

Hi SW420,

I like to use 24 hour lighting under a flourescent T5 (literally an inch or two away). Keeps the plants shorter, which is always handy as I can always run out of headroom in the tent with some strains.

If I may link this though...

β€œA GW Pharmaceuticals study compared the growth rates of eight varieties in day length of 18 and 24h. After three weeks the plant in the 18h day length were shorter and lighter than those in the 24h day length. …..
To produce a similar mass of foliage to the plants that underwent 24hr day length for 21 day, the plants in the 18h group required 28 days, at which point the light energy emitted was the same for both plants, thus saving no electricity. β€˜ –Handbook of Cannabis – Oxford Press, pg. 75

https://themodern.farm/day-length-in-veg/

You're not going to go wrong with whatever schedule you put them under. If you need a heater at lights off, you may as well run them 24/0.

I'm of the thinking that these plants never see any light schedule more than 12 or 14 hours on around the globe so we are stressing them out with 18/6 - 20/4 - 24/0 etc in our tents from the off. :idn:

But the science says they don;t need a dark period in veg so, again... :idn:

Whatever will be cool though. :oik!:

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Re: Light schedule for seedlings???

Post by kbag »

I recently light bleached my seedlings with my 96w T5 1-2" above them being on 24hr with no dark period. It's a first time i have done this with a T5 and was a little surprised that it happened.

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Re: Light schedule for seedlings???

Post by Keeno »

kbag wrote: ↑
Sun Jan 26, 2020 1:20 am
I recently light bleached my seedlings with my 96w T5 1-2" above them being on 24hr with no dark period. It's a first time i have done this with a T5 and was a little surprised that it happened.
K I see that plant you did under that T5 for veg, now bleaching.... are you sure you didnt order a 10k watt led by accident πŸ˜‚

@SW420, I've always been 24/0 from seed to flower, until recently. A strain I thought I knew well was stressing out on 24/0. I now run 24/0 fir a very short period and move to 18/6.
It's nice to be nice :Stoned:

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Re: Light schedule for seedlings???

Post by Marcus »

kbag wrote: ↑
Sun Jan 26, 2020 1:20 am
I recently light bleached my seedlings with my 96w T5 1-2" above them being on 24hr with no dark period. It's a first time i have done this with a T5 and was a little surprised that it happened.
That's a strange one Kbag. These T5 units aren;t too strong.

Maybe someone fed them tiny little babies the adult grub? :suicide: :lol: (Yup, I've done that a few times and fried them)

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