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Light leaks and photoperiods

YYCannabis

YYCannabis

New member
Currently I’ve only grown autos and want to do a photo garden next. I realized today that the zipper on my tent has some weak spots (see pics). It made start to wonder just *how* sensitive are photos to light leaks during flower? Would those small zipper leaks cause issues from ambient room light getting through?

Cheers
YYC
 

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Can you cover those spots YY ? I grow photos and I always check the grow room for light leak before the big switch. Less chance for hermaphrodites.
 
I’m very interested in the answer to this question as well, but even if the zippers are completely light-tight, what about the air inlet areas that are typically at the bottoms of most tents? Seems like that’s the weakest link as far as keeping light out. Right?
 
It’s actually light coming through the base of the little individual zip teeth. I can easily cover it from behind with a strip of felt if i need to. Would that little gap cause hermies?
 
This is a controversial topic. I can tell you my own experience It is my experience from 7 years of growing. I have a hydro set up in my garage where I've grown and harvested many plants. At first I concerned myself greatly about light getting in during dark periods but over the years I got less and less concerned about light getting in. To the point that I am convinced that the intensity of the light in 12 hour cycles is the key factor for flowering. Currently I have 3 grow areas. Small areas. I have an auto on 24 hours light. I have 2 seedlings on 18/6. I have 2 that are in full flowers at 12/12. I've done it over and over. I think the hermie problem is from the seeds. OK guys put some love in it !!
 

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Just a thought...
On every outdoor grow, the girls are subjected to a monthly floodlight arcing across the night sky.
How come they don't hermie????
 
There is a study going right now that actually uses cannabis about how light leaks effect hermaphroditic traits. The question is what spectrums and what intensity will trigger this response in unstable strains. The moon lets off a certain amount of light, enough to see your shadow, so why don't all outdoor plants hermie? Thats essentially the question and it could be a number of things including the angle of light as well as the other two things I mention. But no one really wanted to ruin a crop to study it until now. :)

That being said, the tent I have used for many runs has similar, very small holes in a few places of the zipper stitching. I've never had an issue with it. You can toss a thick blanket over it as well, but if it is sitting in a generally dark room and your genetics are reasonably stable, you should be fine. If anything, maybe put a patch over it using velcro or made from electrical tape.
 
I agree with Eliot Pryor this is a controversial subject. Some will say that any light leaks will turn a plant hermie. I have a pretty decent leak in my flower tent (see picture) that's been there for months now. I haven't bothered covering it because it hasn't affected anything yet. I've had a few ladies turn on me but I contribute it to the strain, not the leak. Main reason I say strain is because I usually have multiple strains going and only some of my ladies turned, mostly same strains. Needless to say I probably won't be growing those strains any more. I really don't think a small leak like that is going to do anything malicious to your girls. Just my thoughts.
 

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When there is a small light leak like that dphipps1020 and there is a hermie or two, I always like to take note of the position of the plant that hermied. Sometimes if it is always the one next to the known leak or in the same position every time, then I may suspect the light leak playing a role in the hermie trait. But again, there isn't a threshold that has been defined as of now.
 
I did. They were actually in the middle of the tent, not even really close to the leak. Went through a few grows with the same strains and they hermied every time. Yet no issues with the other strains, ever. Weird part is that they didn't continue producing pollen sacs. They produced a few, I removed what I saw, and they never came back. It's pretty disappointing because they were bag seed from some pretty good dispensary weed and I got a lot of them but don't want the rest of my buds to be seedy. I may do individual grows in a 4x4 of them in the future, but for now it's mothers and clones.
 
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