plant leaves discolored, brittle, and cracking

this happened overnight im not sure how. i havent given my plant's nutrients since 2 waters ago and i did a 50% strength mix of fox farm big bloom.

this plant is 3 weeks old from sprouting, grown in a closet with a t5 light. happy frog soil / perlite

none of my other 6 plants have done this, the only difference i can think is that this plant is closest to the cold air duct and fan.

the spot that is discolored is really dry and breaks apart easily. other leaves have this too but not nearly as bad.

thanks for any feedback

Judging by the taco leaves, it's heat or light stress.

joedan890 said:

View attachment 2907074

this happened overnight im not sure how. i havent given my plant's nutrients since 2 waters ago and i did a 50% strength mix of fox farm big bloom.

this plant is 3 weeks old from sprouting, grown in a closet with a t5 light. happy frog soil / perlite

none of my other 6 plants have done this, the only difference i can think is that this plant is closest to the cold air duct and fan.

the spot that is discolored is really dry and breaks apart easily. other leaves have this too but not nearly as bad.

thanks for any feedback

Click to expand...

Why are you feeding bloom nutes to a plant in veg???? It needs Veg nutes with even ammounts of NPK value, like 10-10-10 or something...and have you been giving cal-mag or at least some epsom salts???

No food for that seedling in FFHF until it has developed a decent root system, which will take 3 weeks at a minimum, more like 4 weeks. Those leaves are pretty much useless anyway, so don't sweat it. Trim them off and carry on. You really should use a PPM tester to get a true understanding of what the plants are getting, and a plant that young should be getting 350 ppm to 400 PPM after 4 weeks, and gradually increase to 650-700 for the rest of the grow. That is my schedule and I've never burned, and have always gotten good results at harvest. Don't forget to also start adding Calmag at the 4 week point, and continue to add with every other feeding. Peace

It looks like they got burned by nutes. I know you didn't give any nutes lately but still maybe when you watered them the leaves touched the water above the soil which still has nutes in it. That's the only thing I can think of with overnight happening like that. Usually deficiencies don't become that drastic that quick. Theres usually a warning. Good Luck

Update: days later things are getting way worse. my plants went from looking healthy and green to weak and droopy. almost all of my plants are doing it now even including a plant that i started 2 weeks after.



i think i just messed up giving them nutes when i was using happy frog soil. i didnt know this was a "no-no". what can i do now? ive been giving them plain water for over a week and this started happening 3 days ago

Ive been giving them 24/7 light non stop with the light directly above them, there is hardly any heat.

new update. i backed light off a good amount and cut off all the dead stuff. they seem to really have perked back up. im going to stick with regular water until they need nutrients, but how can i tell when that is ?