Please help! Day 17 of flower, diagnoses needed!

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CannabinoidCarson33

CannabinoidCarson33

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Hey guys, here's what's going on...


GARDEN INFO
Im growing 6 plants in a 4x4 in 35% perlite and 65% soil. They are in 7 gallon fabric pots and are growing under two, 240w Meijiu LEDs. I have a 6inch ac infinity fan and carbon filter as exhaust and a 4inch 200cfm intake fan with a 50 pint dehumidifier in the tent venting out to prevent heat issues from the exhaust of the dehumidifier. Im feeding general hydroponics flora series and Cal mag and also started using 'flower fuel' 17 days ago when I flipped. I also always ph to 5.5-6.5 after mixing up nuts before feeding...

All of my plants are on day 17of 12/12 and have responded amazingly to the flip. In 17 days they have doubled in size and the flowers are beginning to form nicely. Everything was perfect until this morning when I went to water.

THE ISSUE

Only one of my plants isn't looking right and I'm looking for help. Its leaves are showing signs of discoloration and are cupping. Then, on certain leaves, the tips are dead and curling upward. This happened in ONE DAY. Yesterday, she was perfect and looking great.

Did I get something on her yesterday while out of the tent? Is it too much heat causing the issues?
I raised the light up to make sure but it seems high enough at well over a foot away...
Pics below...

This is the sick plant...
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Here are the others in comparison...
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20210409_135124_HDR.jpg


Thanks for the help!
 
CannabinoidCarson33

CannabinoidCarson33

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Potassium deficiency. She’s hungry.
Damn! Thank you, I fed her this morning. Is this something that takes time to fix or will a few good feedings fix things? She was a bit dry this morning. I couldn't believe it, I water every other day.
Should I step up the nutes on this plant? Im feeding at half strength
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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What’s your feed schedule? What/ppm/how often. She’s at the point where you wanna load it up. Carefully.
Id be around 7-900 ppm. But I’m not a soil grower.
Taper down the N, up the PK.
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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It’s will be fine. That’s what the leaves are for. She will eat them when you don’t give enough food.
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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Make sure this lights are far enough away.
probably 18”+ away or so.
it’s tough to tell from you photos as well.
could be light damage.
 
CannabinoidCarson33

CannabinoidCarson33

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Make sure this lights are far enough away.
probably 18”+ away or so.
it’s tough to tell from you photos as well.
could be light damage.

Thanks so much for the advice!
I raised both lights to the top of the tent where they will stay for the rest of the grow. Do they usually stop stretching now or do they still have a while (day 17 flower)

What's so odd to me is that all the other plants are still fine and it happened in less than 24hours.
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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you need to raise the light as they stretch. Usually a couple adjustments.
I can’t tell exactly from your photos tho.
what are you feeding? How often?
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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Watering every other day? Feeding at each watering?
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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Nothing wrong bro👊
do you measure ppm?
up the food to 3/4 on the next. See how she looks. Im at my max feedings at this stage.
 
CannabinoidCarson33

CannabinoidCarson33

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Nothing wrong bro👊
do you measure ppm?
up the food to 3/4 on the next. See how she looks. Im at my max feedings at this stage.
I have a ppm meter but was told it was for hydro, so I've not used it! What should I be doing with that and how do I adjust my ppm..Lol nice ill def so that. Thx for the help
🤜🤛
 
Mr.GreenthumbOG

Mr.GreenthumbOG

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Make sure your pens are calibrated
Measure the ppm of your water source to get a baseline. Mix the food with your water. Mix/aerate untill bubbly. Measure ppm.
add more food to get to desired ppm.
ph the water at this time as well. Adjust accordingly. 👍
what I use.
 
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