Welcome to Growroom420 growers forum. Growroom420 is a online cannabis growing community. Follow grow diaries, find solutions to cannabis deficiencies, learn how to grow cannabis and much more. If this is your first visit you will need to register to access the forums full features and enter our many competitions. Click here to register.

Light schedule for seedlings???

A place to get those seeds popping and growing
Post Reply
User avatar
Southwest420
Known User
Posts: 337
Joined: Mon Nov 04, 2019 6:59 pm
Has thanked: 0
Been thanked: 10 times
Contact:
Status: Offline

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’¨
STAY BLESSED GANGπŸ™ŒπŸ™

Glynne420
Respected User
Posts: 1153
Joined: Tue Mar 06, 2018 8:28 am
Has thanked: 0
Been thanked: 205 times
Contact:
Status: Offline

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.

User avatar
Southwest420
Known User
Posts: 337
Joined: Mon Nov 04, 2019 6:59 pm
Has thanked: 0
Been thanked: 10 times
Contact:
Status: Offline

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
STAY BLESSED GANGπŸ™ŒπŸ™

User avatar
Nanook
Banned users
Posts: 9410
Joined: Thu Jan 01, 1970 2:33 am
Location: My nest
Has thanked: 499 times
Been thanked: 602 times
Contact:
Status: Offline

Re: Light schedule for seedlings???

Post by Nanook »

I use 24 for seedlings and change to 18/6 once out the propagator tbh.
These users thanked the author Nanook for the post (total 2):
Thrasherdude (Thu Feb 20, 2020 11:41 pm) • Minty (Sat Aug 22, 2020 7:41 pm)
The quieter you become, the more you are able to hear.

User avatar
Southwest420
Known User
Posts: 337
Joined: Mon Nov 04, 2019 6:59 pm
Has thanked: 0
Been thanked: 10 times
Contact:
Status: Offline

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?
STAY BLESSED GANGπŸ™ŒπŸ™

User avatar
Nanook
Banned users
Posts: 9410
Joined: Thu Jan 01, 1970 2:33 am
Location: My nest
Has thanked: 499 times
Been thanked: 602 times
Contact:
Status: Offline

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.

User avatar
GMO
Podcast Admin
Posts: 7646
Joined: Sat Jun 02, 2018 2:44 pm
Has thanked: 1575 times
Been thanked: 960 times
Contact:
Status: Offline

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
Image
β€œIf you can't explain it to a six year old, you don't understand it yourself.” -Albert Einstein

User avatar
Southwest420
Known User
Posts: 337
Joined: Mon Nov 04, 2019 6:59 pm
Has thanked: 0
Been thanked: 10 times
Contact:
Status: Offline

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
STAY BLESSED GANGπŸ™ŒπŸ™

User avatar
Point 5
GR420 Store Admin
Posts: 1884
Joined: Mon Dec 02, 2019 9:19 pm
Location: UK
Has thanked: 180 times
Been thanked: 1307 times
Status: Offline

Re: Light schedule for seedlings???

Post by Point 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
:puff puff:

User avatar
Marcus
Respected User
Posts: 1598
Joined: Thu Nov 29, 2018 2:25 pm
Has thanked: 531 times
Been thanked: 773 times
Status: Offline

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!:
This is a block of text that can be added to posts you make. There is a 500 character limit.

User avatar
kbag
GR420 Leg End
Posts: 1722
Joined: Sun Oct 29, 2017 5:09 am
Has thanked: 628 times
Been thanked: 243 times
Contact:
Status: Offline

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.

User avatar
Keeno
Site Admin
Posts: 9592
Joined: Sat Oct 07, 2017 10:11 pm
Has thanked: 1271 times
Been thanked: 3059 times
Contact:
Status: Offline

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:

User avatar
Marcus
Respected User
Posts: 1598
Joined: Thu Nov 29, 2018 2:25 pm
Has thanked: 531 times
Been thanked: 773 times
Status: Offline

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)
This is a block of text that can be added to posts you make. There is a 500 character limit.

User avatar
JJ
Posts: 450
Joined: Sat Aug 22, 2020 6:39 pm
Location: Usa ohio
Has thanked: 26 times
Been thanked: 226 times
Status: Offline

Re: Light schedule for seedlings???

Post by JJ »

I do a 24/0 on new sprouts,then the old 18/6.

User avatar
Smelierjoint
Posts: 191
Joined: Thu Aug 13, 2020 9:44 pm
Location: Uk
Has thanked: 101 times
Been thanked: 145 times
Status: Offline

Re: Light schedule for seedlings???

Post by Smelierjoint »

Brilliant question this is, As they have stored energy for a short while.
I was thinking whats the best way to avoid the stretch as this point, and make more of a leaf than a stretch. Does the 18/6 or the 20/4 or 24h on have a better or worse outcome for the plant as whole πŸ€” or just acclimatise as quickly as possible to set into routine.
Sj.

Pass da duchi to dee left hand side :pass:

Post Reply

Return to β€œGermination & Propagation”