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how many hours of daylight does one need to veg outside?

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how many hours of daylight does one need to veg outside?

weed420420420420420 27 Replies 8,295 Views
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weed420420420420420

weed420420420420420

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#1
I believe my area is at 14 hours of daylight. is that enough?
 
#2
You may need supplemental lighting for an additional few hours to insure a healthy veg state or just do a 12/12 light deprivation all the way though.with light dep I’ve heard some do a 2wk veg with 24 light cycle then flip. Idk if 14hr would be sufficient enough
DIY Greenhouse
 
#3
weed420420420420420 said:
I believe my area is at
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believing is not precise enough.

there's daytime calculators on the net, what you want to look at is "nautic" time (because the very early mourning & evening minutes still count as night for plants photoreceptors)

Depending on your genetics even 14h can make it flower prematurely... (uncommon)
 
#4
I put mine out early to mid June which here is about 15 hours
 
#5
nautical twilight is just over 14 hours counted from the end of the dawn one to the beginning of the dusk one. I think I'm good.
thank you
 
#6
I just dropped a couple beans yesterday to put outside June 1st. I’m setting my light timer when they pop the surface to match the sunrise & sunset times for my area. I’ll adjust it on a weekly basis until I get to June 1st, then out they go in a shaded area outside until they are hardened and can take full sun. About a week will do. Once they go out on June 1st they won’t be brought back indoors.
 
#7
I’m in NE Massachusetts. I start my seeds on April 1 under 16/8 lighting, start hardening outside around April 21, then put out full time around first week of May if temperatures permit. Plants can handle down to upper 30s without protection with trash cans. Unless you’re in northern Maine, waiting until June 1 to put plants outside deprives them of critical May growth that really sets up plants for June and July growth spurts.
 
#8
If they are used to 18/6 they will probably flip outdoors at 14/10 then reveg when the nights grow shorter, otherwise seedlings should be fine. Harden them in shade a day or three before any direct sunlight to prevent wilt, start some pest maintenance now for aphids, leafhoppers etc.
 
#9
nashobaTHC said:
I’m in NE Massachusetts. I start my seeds on April 1 under 16/8 lighting, start hardening outside around April 21, then put out full time around first week of May if temperatures permit. Plants can handle down to upper 30s without protection with trash cans. Unless you’re in northern Maine, waiting until June 1 to put plants outside deprives them of critical May growth that really sets up plants for June and July growth spurts.
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in other words they get stalkier and "keep up with themselves better" with adequate veg time.
 
#11
I start my beans as soon as I get 13hrs. I put my girls outside April 10th and they're growing strong.
20220501 123042
 
#12
Madbud said:
If they are used to 18/6 they will probably flip outdoors at 14/10 then reveg when the nights grow shorter, otherwise seedlings should be fine. Harden them in shade a day or three before any direct sunlight to prevent wilt, start some pest maintenance now for aphids, leafhoppers etc.
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Especially true sativas in my personal experience.
 
#13
You can put young plants out there if it's warm enough. They'd never be mature enough to flower before the daylight period is longer than it is now.

If you have plants you've been vegging indoors for a couple of months, they could flower. Plants don't have a watch. They don't give a shit if you think 12 hours is the magic number of night hours. If they did flower, they'd probably reveg and flower again later in the summer.
 
#14
In CT our longest day is a bit over 14 hours, but we start seedlings in April and put out after Memorial day as there is no chance for frost, they have been tasnsplantedand are able to withstand chilly nights, the sun changes spectrum during the course of the season, so at first your getting allot of good blue veg light, as the season continues your light will change to full spec, as the season ends the days get shorter inducing flowering and sun is throwing off allot of red light, so you see how it's all connected? The trick is to start ur seedlings early so there big enough to thrive when put outside.
 
#15
Edinburgh said:
In CT our longest day is a bit over 14 hours, but we start seedlings in April and put out after Memorial day as there is no chance for frost, they have been tasnsplantedand are able to withstand chilly nights, the sun changes spectrum during the course of the season, so at first your getting allot of good blue veg light, as the season continues your light will change to full spec, as the season ends the days get shorter inducing flowering and sun is throwing off allot of red light, so you see how it's all connected? The trick is to start ur seedlings early so there big enough to thrive when put outside.
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CT is exactly where I learned the most about outdoor growing. My garden ("The Patch") was about 100 feet from the waters of the L.I. Sound, so we seemed to have some protection from frost in the fall. (That was decades ago. The land my patch was on is now part of a family's multi-million dollar estate. The middle class was gentrified out of waterfront a long time ago.)

We used to put them out by mid-May. They'd get hit with frost sometimes, and weathered it every time. I remember planting one day, and then seeing flurries that night! Plants turned white, but all survived. Seedlings seem to be tougher than adult plants when it comes to frost.
 
#17
weed420420420420420 said:
I believe my area is at 14 hours of daylight. is that enough?
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If you start from seed outdoors right now you’d be fine. If you’ve been growing indoors w/18rs and move out now (w/no subsequent lighting), it will most likely flip. (Not a sudden flip like an indoor, but will exhibit early flower and then reveg.)
 
#18
which is a good way to set up for hermies right? flower then reveg is risky is it not? increased herm tendency?
 
#19
if you’ve been vegging indoors 18/6 then would it be a good idea to cut back slowly on light time to get to 14 hrs prior to putting outdoors? If they do flower outside should you cut the flower off and then it goes into reveg?
 
#20
MJgrass said:
if you’ve been vegging indoors 18/6 then would it be a good idea to cut back slowly on light time to get to 14 hrs prior to putting outdoors? If they do flower outside should you cut the flower off and then it goes into reveg?
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I slowly taper down from 18 to around 14 and put them out the last week of May, first of June, depending. They slowly get hardened for most of May. They usually just blow up as soon as they are in the ground and continue to veg for a good while before stretching and showing preflowers. Mine are usually 2-3 months deep on veging by the time I get them out. I'm in the Northeast.
 
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