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if you haven't been ph'ing water that could be the problem. so hard to tell when plants are so young. not looking good though. ph water to whatever is recommended for your media and back that light away to > 12" as seedlings this young require very little light.

thanks for the prompt responses, guys. they are completely yellowing/browning/dying starting from the tips and moving down the leaves. i figure just let em go. i've had leaves yellow up last week after flush, but not like this. the pots are equally tall as they are wide (or close to it)...

i lst every crop. i often get splits. i used to bind them, but the last few crops i've just let them go. they're fine. just take it easier. this pic is from my latest crop. taken 4 weeks ago. left them alone. plants are finishing flowering this week. the pic doesn't show them well, but...

looking good and full for two weeks in. start feeding schedule.

give it time. it can take up to six weeks to reveg. best to get fresh clones from a veg'ing plant unless you really love the bud.

you can clone tops no problem. get that humidity up. get a dome. people recommend anywhere from 70-90% for clones. you'll get a variety of answers which i imagine means they all work. i've cloned with a dome and plugs and clonex with no problem. also, note that it is common that they will...

overwatering can present that way. i've seen it first hand. can you give more details? nutes? water/feed schedule? media? lights? pot size? temps? humidity? etc?

White Widow flowering for 6.5 weeks 5 gal Coir/Perlite 80/20 Canna Coco base plus Boost and Cannazym (every other feed) @ 5.8 pH on alternating feed/water schedule. 600w hps air cooled @ 1.5ft temps at tops 82 degrees F relative humidity 43-47 (fluctuates constantly) supplement with CO2 in...

i'm not sure which conversion, broski. 2.8 EC on a milwaukee pen and i use a chart i printed some time ago for conversion it doesn't say which conversion. plants never showed a definite sign of burn, but i still lowered EC to 2.0, began supplementing with calmg and increased water frequency...

take a better pic with your lights off.

great read, man. the dude is spot on with references. about time i got some real info on CO2 ppm. gonna turn mine down in a few.

umm.. judging by you pic everything looks fine!

lol. exactly, man. thanks, broski!

interesting. you have a link to that study? every one recommends 1500 ppm, but i've never seen that number backed by any thing. i'm always interested in legit research.

i agree, man. 2000 ppm is extremely high. like i said, i'm gonna get it down on the next feed. 82 degrees is low with co2. 86-90 F is perfect threshold for co2 uptake. this is argued, but look in any horticulture book you will see those numbers are dead on.

whoaaaa... i just read your nute dosing. dude, why have you strayed so far from the GH feeding schedule? and why sm-90? have you had pests before? you: Micro 8ml Grow 6ml Bloom 8ml Nectar 15ml GH recommends for week 2 of flower Micro 4ml Grow 1ml Bloom 5ml Nectar 2.5ml per gallon. you're...

hoop, i don't believe the co2 is causing those problems. it looks like severe over watering and some extreme deficiency to me.

you're good, man. if at day 21 you still don't have roots then worry.

what's your water schedule? how much water? how often? media? size of containers? how dry is media before you water? keep you co2 gen going. theyre good. if you're really concerned, vent the room at night.

alriiigghhht.... the skinny: White Widow flowering for 4.5 weeks 5 gal Coir/Perlite 80/20 Canna Coco base plus Boost and Cannazym (every other feed) @ 5.8 pH on alternating feed/water schedule. some times if too moist i'll wait a day to let them dry out completely. 600w hps air cooled @ 1.5ft...