URGENT Help needed I burnt my plants with peroxide week3 flower

T

The Bodgeineers

Well-Known Member
I made a stupid stupid mistake and got the dilution wrong on a hydrogen peroxide spray.
Ended up giving them 3% wash at 3weeks into flower.

Most of the leaves are curled up and going crispy with all the white pistals turned brown and burnt like light burn!!

Is there anything I can do? These are big 8+ Oz plants that had a long veg time. If I can fix them over starting over that would be better.
Not sure if I should just hope they recover and increase light to 13on 11 off or just cut off all the damage and try switch them back to veg then flower again???

5 plants filled out in a 5ft tent in 25ltr Coco

Pics to follow tomorrow Morning when I get home.
 
dwc420letsgo

dwc420letsgo

Well-Known Member
why would you increase the amount of light if they are stressed out? In any case, do the opposite, lower par and maybe 11/13.
Switching back to veg will take a long ass time, might as well start with new beans in my opinion. It is early in flower and they were gonna start stacking up, but now they will be stunted and the quality will not be as good as it could have. Why waste more time for a subpar result? Start over. Learn from the mistakes. Harvest some fire weed.
 
T

The Bodgeineers

Well-Known Member
I was thinking 13 hours light at less intensity to prolong the flower time .
To get back to this point would be 6+weeks of veg time then 3 weeks flower and now I'm looking at issues with summer heat in my grow space.
 
thumper60

thumper60

Well-Known Member
The Bodgeineers said:
I made a stupid stupid mistake and got the dilution wrong on a hydrogen peroxide spray.
Ended up giving them 3% wash at 3weeks into flower.

Most of the leaves are curled up and going crispy with all the white pistals turned brown and burnt like light burn!!

Is there anything I can do? These are big 8+ Oz plants that had a long veg time. If I can fix them over starting over that would be better.
Not sure if I should just hope they recover and increase light to 13on 11 off or just cut off all the damage and try switch them back to veg then flower again???

5 plants filled out in a 5ft tent in 25ltr Coco

Pics to follow tomorrow Morning when I get home.
Click to expand...
Strange i have sprayed straight 3%peroxcide many times never burned anything. Did you happen to spray with lights on.
 
T

The Bodgeineers

Well-Known Member
thumper60 said:
Strange i have sprayed straight 3%peroxcide many times never burned anything. Did you happen to spray with lights on.
Click to expand...
Nope! I sprayed( absolutely drenched about 1.5ltr of 3% solution)soon as lights off then had fan on them strong all day.. I checked them 4 hours before lights on and they were still wet and showing damage on leaf like the veins where showing through, faint brown spots ect. I panicked and soaked them again with just water to wash off any residue.
Moved the fans Central to dry faster and
Then the lights came on after 4 hours.( running 700-800ppfd full spec).
Next morning after light cycle my plants are 70% crispy
 
thumper60

thumper60

Well-Known Member
The Bodgeineers said:
Nope! I sprayed( absolutely drenched about 1.5ltr of 3% solution)soon as lights off then had fan on them strong all day.. I checked them 4 hours before lights on and they were still wet and showing damage on leaf like the veins where showing through, faint brown spots ect. I panicked and soaked them again with just water to wash off any residue.
Moved the fans Central to dry faster and
Then the lights came on after 4 hours.( running 700-800ppfd full spec).
Next morning after light cycle my plants are 70% crispy
Click to expand...
Something not right I have been spraying 3% ho20 on plants for yrs never burned them outdoor or indoor.
 
T

The Bodgeineers

Well-Known Member
thumper60 said:
Something not right I have been spraying 3% ho20 on plants for yrs never burned them outdoor or indoor.
Click to expand...
The lights could have come on whilst plants were still wet from my second dosing of water.
Either that or it came out stronger than 3% ( I started with 500ml of 12% and added 1.5ltr of water so it was definitely 3%

Regardless of the catalyst to my burning the main question is , can they be saved?
I would have had 5 weeks left of flower as these are 3 weeks from switch so it would take atleast 7-9 weeks to pop some new beans to this same size of plant .will try get some pis up later but probably tomorrow morning
 
thumper60

thumper60

Well-Known Member
The Bodgeineers said:
The lights could have come on whilst plants were still wet from my second dosing of water.
Either that or it came out stronger than 3% ( I started with 500ml of 12% and added 1.5ltr of water so it was definitely 3%

Regardless of the catalyst to my burning the main question is , can they be saved?
I would have had 5 weeks left of flower as these are 3 weeks from switch so it would take atleast 7-9 weeks to pop some new beans to this same size of plant .will try get some pis up later but probably tomorrow morning
Click to expand...
Your math is right if it was 12%.
 
T

The Bodgeineers

Well-Known Member
Here are the pics. So is it salvageable?
 

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T

The Bodgeineers

Well-Known Member
Here are the pics , so can I fix it? I've turned down the lights to 400-500pffd
I think this was mild light burnt plants which the peroxide then accelerated . Then lights came on with plants still wet and really fucked them up.
 

Attachments

thumper60

thumper60

Well-Known Member
The Bodgeineers said:
Here are the pics , so can I fix it? I've turned down the lights to 400-500pffd
I think this was mild light burnt plants which the peroxide then accelerated . Then lights came on with plants still wet and really fucked them up.
Click to expand...
Boy pretty burned up, Those can be limped to the finish but not fixed yield will be way down. Its up to you.
 
T

The Bodgeineers

Well-Known Member
I lost alot of leaf but after 1 week then flowers came back white. I'm going to finish them and add some PK13/14 to try extend the flower and bulk phase.
 
R

RockStonedJesus

Active Member
They look burnt, for sure.

Some H2O2 come paired with a stabilizer chemical, which keeps the H2O2 more "stable".

As such, even 3% H2O2 can cause burns, since the H2O2 doesn't break down as quickly as raw H2O2 without the stabilizer chemical.

I know this first-hand after discussing with a local horticulture company, as their H2O2 was manufactured (as per the sticker), over 18 months from the date of purchase. After questioning, they advised that the H2O2 remains stable due to the additive.

I've experienced strange stuff with this H2O2, it burns my fingers at such low rates, and I've had all sorts of drama where most other people can use H2O2, such as for sterilizing seedlings, popping the seedlings, etc.

There's absolutely NOTHING you can do to reverse this. You can either soldier on, or start again.

I recommend soldiering on, as you already have, as the damage isn't as bad as what I've had in the past.

DO NOT change your nutrient schedule, DO NOT give them unnecessary PK boost products.

Keep feeding them on a BASIC schedule. I still don't understand why people are dumping PK products. Cannabis DOES NOT need massive PK dumps. Keep the same feed schedule through flowering. Increase your Potassium, if anything, but only slightly.

I've done a lot of market research on these nutrient companies, and they're all over-fertilizing.

Keep it simple. Keep doing what you're doing, defoliate the big fan leaves that are blocking light to lower bud sites from week 4 onwards, and slowly defoliate a little bit each week until you're finished.

I'm sure you'll get some fire nugs. If only you saw the damage I did with an ozone generator to try and kill the insect infestation I had... HAHA.

GOOD LUCK!
 
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