Weird raised burnt edges and tips

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Nilspoulsen

Active Member
2nd Grow and running a GSC auto from homegrown cannabis. Its been about two weeks since first signs of burning and it got worse when I left it getting automatically watered for only 2 days at around 1150 EC.
100W spider farmer LED, 3 gallon fabric pot with a (buffered)coco/perlite mix. Watering once a day with CocoSensi Bloom part A & B (pHperfect) @ 1000-1150 EC generally.
Watering until runoff everyday. My 1st grow was a much smaller plant and it did not stretch much - im thinking light burn got to it first but Ive raised the lights and it seemed to still have gotten marginally worse. It definitely got worse when I left it on a timed watering schedule- (sat in saucer and absorbed the water that should have ran off)

Just looking for advice on what to do from here to get the best end product possible, really trying to get some dense bud because my first grow was pretty airy.
Haven't posted here in a min so sorry if I left out any information needed to make a suggestion
Thanks in advance
 

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twentyeight.threefive

twentyeight.threefive

Well-Known Member
Looks like the beginning of a potassium deficiency. Most likely caused or made worse by the excess nitrogen being given to the plants.

I would reduce the amount of nitrogen in your nutrient mix and thoroughly flush the pots with the new nutrient mix. Don't ever let the pots sit in runoff, that part obviously didn't help your situation.

How close is your light to the canopy?
 
N

Nilspoulsen

Active Member
twentyeight.threefive said:
Looks like the beginning of a potassium deficiency. Most likely caused or made worse by the excess nitrogen being given to the plants.

I would reduce the amount of nitrogen in your nutrient mix and thoroughly flush the pots with the new nutrient mix. Don't ever let the pots sit in runoff, that part obviously didn't help your situation.

How close is your light to the canopy?
Click to expand...
Im in class right now but Im pretty sure its about 14-16Inches away (after I moved them up a bit)
and the lighting manual says 12-16Inches away should be fine in flowers
 
N

Nilspoulsen

Active Member
Wastei said:
Sure that's not 1000-1150 ppm? They look way overfed. Burnt pistils all over and burnt tips from potassium def from excess N. Way to dark shade of green.
Click to expand...
Absolutely sure that those values are in EC that why Im so frustrated. I had burn problems last grow as well feeding up to 1400EC so I amde sure to keep it under 1200EC and Im still having problems - and the plant is twice the size from the last one.
I mix way less than the nutrients say I should and base it off EC
Im wondering if maybe feeding watering EVERYDAY at 1000-1150 EC is the problem? SHould I only be feeding them every other watering? IDK
 
twentyeight.threefive

twentyeight.threefive

Well-Known Member
Nilspoulsen said:
Absolutely sure that those values are in EC that why Im so frustrated. I had burn problems last grow as well feeding up to 1400EC so I amde sure to keep it under 1200EC and Im still having problems - and the plant is twice the size from the last one.
I mix way less than the nutrients say I should and base it off EC
Im wondering if maybe feeding watering EVERYDAY at 1000-1150 EC is the problem? SHould I only be feeding them every other watering? IDK
Click to expand...
Coco should be FED at least once daily.
 
PJ Diaz

PJ Diaz

Well-Known Member
Nilspoulsen said:
Absolutely sure that those values are in EC that why Im so frustrated. I had burn problems last grow as well feeding up to 1400EC so I amde sure to keep it under 1200EC and Im still having problems - and the plant is twice the size from the last one.
I mix way less than the nutrients say I should and base it off EC
Im wondering if maybe feeding watering EVERYDAY at 1000-1150 EC is the problem? SHould I only be feeding them every other watering? IDK
Click to expand...
EC isn't measured that high. Most people feed between 1.3 and 2.0 EC in flower, so not sure what scale you're using? PPM? TDS? I'm curious about your EC conversion. It's pretty clear that it's an excess of nutes, which was intensified by your letting the runoff flow back into the media, thereby causing high EC accumulation in your media. Personally I would flush them with a 50% nute solution, and then get back on track with a proper feed schedule.
 
N

Nilspoulsen

Active Member
twentyeight.threefive said:
Coco should be FED at least once daily.
Click to expand...
Yeah I think you're the one that told me that a while back lol. Im going to flush with around 500EC and then try to water with 900EC with a ~60/40 mix for part A & B respectively - and see if that works.
Let me know if dropping to 900 would be enough to help the burn
Also, just measured the lights and the tallest budsite sits 13.5 Inches from the light and the other tall ones around 15inches. Some budsites are even farther. Burn and raised tips are consistent throughout whole plant basically top to bottom but she is lolipopped
 
N

Nilspoulsen

Active Member
PJ Diaz said:
EC isn't measured that high. Most people feed between 1.3 and 2.0 EC in flower, so not sure what scale you're using? PPM? TDS? I'm curious about your EC conversion. It's pretty clear that it's an excess of nutes, which was intensified by your letting the runoff flow back into the media, thereby causing high EC accumulation in your media. Personally I would flush them with a 50% nute solution, and then get back on track with a proper feed schedule.
Click to expand...
1.0 EC on my meter is read 1000 EC
Using a vivosun TDS & EC meter combo that can read PPM and EC ( I am in EC mode)
 
twentyeight.threefive

twentyeight.threefive

Well-Known Member
Nilspoulsen said:
Light is only 100W do you think that since the input of light is low that the plant doesnt need as many nutes?
Part A is 4-0-0 and Part B is 0-4-5 and they call for even amounts I could put a little less of part A maybe?
Click to expand...
I would reduce Part A by a bit. If it's 5ml of both then do 3 ml of A and 5ml of B.

You the less intense a light then the less nutrients the plant will require. Nutrient uptake is also affected by temperature and RH.
 
twentyeight.threefive

twentyeight.threefive

Well-Known Member
Nilspoulsen said:
Yeah I think you're the one that told me that a while back lol. Im going to flush with around 500EC and then try to water with 900EC with a ~60/40 mix for part A & B respectively - and see if that works.
Let me know if dropping to 900 would be enough to help the burn
Also, just measured the lights and the tallest budsite sits 13.5 Inches from the light and the other tall ones around 15inches. Some budsites are even farther. Burn and raised tips are consistent throughout whole plant basically top to bottom but she is lolipopped
Click to expand...
No you want less A. 4-0-0 is the N-P-K value. All the nitrogen is in part A and that's what you need less of.

Just mix up nutrients like 40%/60% and use that to flush the plant. Maybe like 0.8 EC.
 
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