Is Light Bleaching real or bull Shit?
- Thread starter motul123
- Start date
researchkitty
Well-Known Member
Our grow op has about 14000 to 18000 watts of flowering at any given time............. Sometimes, if a plant gets too close to the 1000w hps lamps, it will bleach the hairs out, turn it pretty white, and then if uncorrected, continue to hurt the plant.
Brick Top
New Member
It's real.
motul123
Active Member
I ask cuz I think I might have one. It looks healthy but the new leaves are bleaching a bit. Here is a pic. The rest of the plants look good, though I do have a Ice that has a little yellowing on the edge of one leaf, also will include a pic. Whats your thoughts. Also I have started a 1/4 nute feeding after 3 weeks growth all organic HESI. The problem was there before the nute sched.
Detroit J420
Well-Known Member
sure can bleach the hairs and the leaves.... ive done it with hid, and l.e.d, as long as the temps arent to bad potency should still be good
Phaeton
Active Member
When the light (not heat) bleaches a plant it just destroys the chlorophyll. The affected parts turn white, but the leaf itself still respirates and is not dry or crumbly. Usually heat is involved and the leaf will dry out, but straight light overload only kills off the chlorophyll to start with.
researchkitty
Well-Known Member
You generally wont light bleach your vegging plants, or plants without flowers on them. Instead, those plants get nasty and crumbly and dry then die. But for the mid to end of flower if the plants grow too tall into the lights and tha tisnt controlled, is when the light bleaching generally occurs......
hi guys, i know this is an old post, but just wanted to show some pics of what i believe is bleaching. I've been giving a good dose of nutes and so ruled out any defs. the plants have grown pretty tall and the distance from my 400w hps is about 12 inches, but thats the furthest it can be in my growbox. I would think there is some harm with having the chlorophyll burnt out of your leaf...just
not sure how much though
girls just finished week 7
not sure how much thoughgirls just finished week 7
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outlander1
Member
Not bleaching, just your plant eating up needed nutrients (N) present in your leaves. You are in late flowering and this is expected.
On the home stretch!
On the home stretch!
ValleGrown
Well-Known Member
You could just as easily research this yourself and post it as he does.
ValleGrown
Well-Known Member
Not saying that bricktop doesn't know his shit but.. Still. He's not your monkey
Happy growing
Happy growing
missnu
Well-Known Member
the concentration of the sun outside is spread out over everything and there are usually other things in the way...when a plant is growing inside under a light the light is concentrated, but I think a lot of times what people want to call light bleaching is actually just some other issue...I haven't seen any pics yet that were lgith bleached...and a lot of plants can get bleached while others can't...MJ is hard to bleach as it prefers full sun and is set up to deal with ultra bright lights...but plants that like shade or partial sun can bleach in a heartbeat.
ValleGrown
Well-Known Member
I actually don't think this is entirely true. MJ I believe gets stressed out after about 16 hours of light. They get tired from working. They need rest. They don't get light 24/7 or even 18/6 anywhere on this eart that are suitable growing conditions. Even in afghanistan or the Mexican landrace sativas don't get that much light. They get shaded by clouds and things trees etc.. But just thought I would say that you must mimick nature. In a grow tent with 50k + lumens that's no where near nature. You figure on the best days x amount of lumens per square foot is good. The sun is powerful enough to have exceptional penetration through the canopy to spread out in the lower levels of the plant but with the best hid lights you have maybe 2' of penetration to the canopy . So as the light separates you loose lumens. And growing power. People have learned to correct this by lowering their lights. HID lights can bleach plants if left for hours on end with extreme exposure to the canopy within inches of the bulb. That powerful Of a spectrum for that long. With that amount of lumens so close will definitely damage the pigment of any living thing.
ValleGrown
Well-Known Member
So I do Apologize sir but your claim of full sun is not entirely accurate.
ValleGrown
Well-Known Member
University of Minnesota proved this I believe when they brought you G-13.