Can't get this plant out of stress mode. Its the only plant that took this route so far. I have 7 other plants and none has done this. I used Cal Mag, Big Bloom and Grow Big and the leaves are still coming out stressed. Its been in stress mode for 3 weeks or more. Any help would be appreciated.
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More info would be helpful. Lights, temp humidity, feed etc.
Since you have 7 other plants that are ok, I’ll assume your lights/temp/rH is fine.
Those twisted tacos are amazing. I’ve never seen such tight taco leaves. Since it’s probably not an issue from the environment, it has to be an issue at the roots.
Most Likely Causes
- Genetic sensitivity or mutation
- Root damage or poor drainage
- Salt buildup or pH lockout
- Micronutrient imbalance (zinc, boron, copper, etc.)
What you need to Do
- Flush with pH-balanced water + light Cal-Mag (¼ strength).
- Check runoff EC and pH (target: 0.8–1.2 EC, pH 6.2–6.5 for soil or 5.8–6.0 for coco).
- Monitor new growth—if still twisted after reset, it’s likely genetic.
More info from you will help us to help you
There are 3 things you must check everyday when growing in hydro:
1) Water level (How much h2o is she drinking in 24hrs)
2) pH level (change over 24hrs)
3) ppm/EC level (How much food is she eating in 24hrs)-
I had them under 4 - 200 watt LED lights at approximately 3 to 3 1/2 feet from plants. I down graded to two after I saw the stress. Heat average is 77-79°. PH is around 6.2, humidity ranges from 53 - 65%. I checked my run off at last feeding, PPM- 649 CM- 1380. I'm using Fox Farm soil, so I didn't think a flush would be necessary. It was the tallest plant at the time of stress that's why I'm leaning towards heat stress. I took it out of the tent for a couple of days to try to relieve some stress. Put it back in with 2- 200 watt LED's and it hasn't recovered. Maybe I'll take it out for a week to see if that helps.
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To much light intensityComment
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Yep. Its light burn. Its the one right under the light, in the middle hey. The rest are getting less at the sides.Flower Room: 11' x 7' x 7.5'H, 480w AC, 13gal/day dehumidifier, 1.5gal ultrasonic humidifier, 60gal (27gal usable) nute tank, 16" pedestal fan & 18" wall fan. Lighting and climate automated. Hand watering.
Veg Cupboards: Two 4x2x6H cupboards. SF2000 Evo in one SF7000 in other. Climate controlled and automated. Hand watering
Aeroponics Low Pressure Bucket: 20W LED. 5 clones & 20W LED 11 clones
Lights: Mars Hydro FC-E1200W, SF-7000, SF-2000 evo in flower room.
Medium: Coco/perlite, 7.2gal pots, no drains
Current Grow: 5 x Photos Franklin's Orange Zkittles x Sour Diesel in flower room, 3 Franklin's White Widow x Sour Diesel Clones, 13 x Orange ZkittleZ x Sour Diesel clones in Aeroponics buckets x 2.
Last Grow: A mixComment
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I would move the plant so that it isn't in the hot spot of the light first of all. It could be genetic but I'm thinking it's more light burn than anything else.
Do you have a way of measuring how much light is hitting your plants? Free light meter app will get you in the neighborhood. Android/Tent Buddy. Iphone/Photone.
I like to use DLI as my lighting guide to keep from light stressing my plants.
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The light measurement is 3500 lux now. It was around 5600 when the stress took place. I have since cut off 2 of the 4 - 200 watt LED's.Comment
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The light measurement is 3500 lux and DLI is 2.5 for 18hrs as of now. I have since cut off 2 of the 4 - 200 watt LED's which was giving around 5600 lux.Comment
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5600 lux is about 120 PPFD and that is not enough light to burn a seedling, neither is 2.5 DLI. I admit you have taken canoeing to a level I have never seen but I would be very surprised if those lights were strong enough to burn anything. What is the temp in there? Get one of the light meter apps that RootsRuler mentioned and a wattage meter. I would be surprised if all 4 of those lights on single outlet are drawing 2000 Watts combined. What brand and size are they
I would cut those leaves off, dry them and use them for rolling papers
FYI When comparing PPFD vs lux, it’s important to recognize that these metrics serve different purposes. While lux measures the brightness of light as perceived by humans, PPFD quantifies the number of photons within the photosynthetically active radiation (PAR) range that plants can absorb.
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My lighting set up is not directly over the stressed plant. It wasn't directly over it from the beginning. But I did have my lights about 12" from the plants when all 4 was on. I extended my tent upwards another 3' and moved my lights up around 3-3 1/2 ft from the plants. Not to long after I made the move, the plant suffered stress. The ones directly under the lights did not stress.Comment
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You need to read up on what DLI & PPFD & PAR is and what they mean for your plants.
The numbers you gave earlier do not make sense.
Flower Room: 11' x 7' x 7.5'H, 480w AC, 13gal/day dehumidifier, 1.5gal ultrasonic humidifier, 60gal (27gal usable) nute tank, 16" pedestal fan & 18" wall fan. Lighting and climate automated. Hand watering.
Veg Cupboards: Two 4x2x6H cupboards. SF2000 Evo in one SF7000 in other. Climate controlled and automated. Hand watering
Aeroponics Low Pressure Bucket: 20W LED. 5 clones & 20W LED 11 clones
Lights: Mars Hydro FC-E1200W, SF-7000, SF-2000 evo in flower room.
Medium: Coco/perlite, 7.2gal pots, no drains
Current Grow: 5 x Photos Franklin's Orange Zkittles x Sour Diesel in flower room, 3 Franklin's White Widow x Sour Diesel Clones, 13 x Orange ZkittleZ x Sour Diesel clones in Aeroponics buckets x 2.
Last Grow: A mixComment
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Hmmmm.... with the extra info I'm starting to think this is genetic or some sort of root issue.Comment
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!!Flush!!Originally posted by YYCannabis View PostSince it’s probably not an issue from the environment, it has to be an issue at the roots.
Most Likely Causes
- Genetic sensitivity or mutation
- Root damage or poor drainage
- Salt buildup or pH lockout
- Micronutrient imbalance (zinc, boron, copper, etc.)
What you need to Do
- Flush with pH-balanced water + light Cal-Mag (¼ strength).
- Check runoff EC and pH (target: 0.8–1.2 EC, pH 6.2–6.5 for soil or 5.8–6.0 for coco).
- Monitor new growth—if still twisted after reset, it’s likely genetic.
More info from you will help us to help you
!!check!!
!!monitor!!
There are 3 things you must check everyday when growing in hydro:
1) Water level (How much h2o is she drinking in 24hrs)
2) pH level (change over 24hrs)
3) ppm/EC level (How much food is she eating in 24hrs)Comment
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If you look close it looks like some of the damaged leaves are below healthy ones. Could it be something like bugs at the stem level? That's the craziest looking light stress.damage I've seen.Comment
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These numbers are from the Photone appComment
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Something is not right about those #'s for sure, I think you could get more PPFD and DLI from an LED light bulb or flash light.
What does the PPFD map show those lights putting out and at what height? If they dont post the PPFD map or if they say its good for flower but show a PPFD of 300 in the corners of your grow area foot print or less dont buy them. LED sales people are lower than politicians in my book. Dont take it to heart, I have shelves of LED's that didnt perform
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12 x 12 full spectrum grow lights. Supposedly 200 watts each.Comment
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Rootsruler, no power output on box. I found a question and review article.Comment
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Drphil69 been there done that more than once, what is worse is I did the same thing with guitars. I did finally do some reading and learned how much PPFD the plants need and when they need it. If a LED seller says thier lights can cover a 4X4 area for flower and PPFD chart shoes 300 or less in the corners and 1500+ in the center, that is not a good light for the area. If they dont have a PPFD map, walk away -
Because 45 was the way to size a light when many were using HPS lighting. LED's are more efficient than HPS so you don't need as many watts per sq ft.
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If those #s are right, then it's doubtful they did that damage unless they were touching them. 77-79° should be fine too. Root problems or something else but not light stress at 3 1/2 feet at 25 watts. pH at 6.2 going into ocean forest soil is kinda low. OF used to give me fits with pH. I had to add lime and run pH at 6.5-6.7 just to get my runoff above 6.Last edited by Bowhunterwoody; 06-05-2025, 04:51 PM.Comment
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Clark1033 I'm using Rootsorganic original with a little dolomite lime and perlite mixed in. It's a little more consistent than FoxFarm
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