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Light burn
- Thread starter John boy
- Start date
DW2
New member
Howdy John boy,
The damage that I see looks more like some nutrient burn to me. Light burn, in my experience, happens mostly on the upper leaves closest to the lights and is more wide spread on the leaf, some times in the middle of the leaf. The brown leaf tips is more of an indication of over feeding. Are you growing in soil or hydro? Also what kind and wattage of light are You using and how far is it above the plants?
Over all Your plants look healthy and look like they are ok.
I grow in a hydroponic set up and I use CFLs. I have had both like burn (usually during the vegetative stage and during the flowering stretch) and I keep them fed and have a little 'neut' burn. I trim off the light burned leaves, but no the 'neut' burned tips.
Good luck with your grow.
The damage that I see looks more like some nutrient burn to me. Light burn, in my experience, happens mostly on the upper leaves closest to the lights and is more wide spread on the leaf, some times in the middle of the leaf. The brown leaf tips is more of an indication of over feeding. Are you growing in soil or hydro? Also what kind and wattage of light are You using and how far is it above the plants?
Over all Your plants look healthy and look like they are ok.
I grow in a hydroponic set up and I use CFLs. I have had both like burn (usually during the vegetative stage and during the flowering stretch) and I keep them fed and have a little 'neut' burn. I trim off the light burned leaves, but no the 'neut' burned tips.
Good luck with your grow.
John boy
New member
No Title
WD2 thanks for your input I'm growing in soil and I am using CFLs also. I've got my light now 2 feet away I thought it was light burn cos my plants took a stretch and where touching my lights I am using 250w CFL 2700k. Thanks for your input mate really appreciate it what do you think I should do then if it's nutrient burn? I've had them on just PH water for 5 days now
WD2 thanks for your input I'm growing in soil and I am using CFLs also. I've got my light now 2 feet away I thought it was light burn cos my plants took a stretch and where touching my lights I am using 250w CFL 2700k. Thanks for your input mate really appreciate it what do you think I should do then if it's nutrient burn? I've had them on just PH water for 5 days now
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DW2
New member
I try to keep my lights about 4-6 inches above the plants. If You keep the light too far away, they will stretch towards them, just gage the distance by placing Your hand under the light and feel the heat, if it is uncomfortable to Your hand, then it is too close for the plants (from the GWE site). Not being a 'soil' person (except for a 'dirty' mind, LOL) I do not know how One should handle the nutrient burn, other than what You are doing.
Good luck with Your grow.
Good luck with Your grow.
tyler_ hobbyist
New member
What is ur RH because that can play a role in how much nutes ur plants drink if ur rh is low ur plants drink more if it's normal 40rh than that's not the issue
tyler_ hobbyist
New member
I use soil and I find the best way to get rid of nute burn is to fully flush ur system with ph water and let it dry out then feed with half nutes. Do u have any perlight/ how's ur drainage because u dnt wanna over water ur plant and drown em. I ask about perlight because it's awesome in soil I use 1/3 and it doesn't matter if I add 1 gal of water per pot over half flows out for really nice drainage
tyler_ hobbyist
New member
The parts of the leaves that have turned color can no longer pull in sun so I pluck the discolered part of the leaf off. This helps figure out if u have any more nute burn and still allows ur plant to pull in more light unless u could use some defol then just pull the whole burnt leafs
tyler_ hobbyist
New member
Any leaf that gets nute burn wount turn back green.
tyler_ hobbyist
New member
Hey John boy how's ur drainage for the soil?
tyler_ hobbyist
New member
Awesome! That will really help the plants and also when u flush ur soil this way they dnt drownd. A lot of people dnt add enough areogation and they end up over watering there plants
tyler_ hobbyist
New member
How's ur issue comeing along?
tyler_ hobbyist
New member
Awesome sounds great did u cut back on nute doseage a bit?
tyler_ hobbyist
New member
Ur very welcome I like helping people 
bobsakamoto
New member
just a note on the hand test for lights...it does not give a true indication if you are using LEDs--i know you are using only CFLs now, but if at some point in the future you use any type of LED they will cause light burn while giving off little to no heat. just letting you know...
John boy
New member
No Title
Thanks guys. I've harvested 2 plants and I still have 2 which I planted the same time as the other ones. They are autos and I topped them. The ones I didn't top were great but these 2 topped ones seem to be taking ages they started to flower about 5 weeks ago they got burned by my light so I took most of the burned ones off and now it's like there revegging so even though there autos I've switched to 12/12 hopefully they will flower now Be great to hear what you guys think?
Thanks guys. I've harvested 2 plants and I still have 2 which I planted the same time as the other ones. They are autos and I topped them. The ones I didn't top were great but these 2 topped ones seem to be taking ages they started to flower about 5 weeks ago they got burned by my light so I took most of the burned ones off and now it's like there revegging so even though there autos I've switched to 12/12 hopefully they will flower now Be great to hear what you guys think?
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Marley
New member
I don't think you're getting light burn, not with CFL's. You can get those suckers close... like inches away. To me it looks like nutrient burn and nitrogen toxicity, which sort of go hand in hand in this case. I'd flush with PH'd water and re-evaluate the amount of nutes you're giving and how often.