Advice Please? White Widow looking sickly

Aero808

Well-Known Member
Hello all,

My white widow girl is looking a bit rough! Wondering if anyone might help shed some light on what's happening.

The story: The WW seedling was the last to sprout and looked a bit sickly at first. The cotyledon never had a nice green color, they were more like yellow/brown and blotchy. The new growth all looked good. I gave it a couple of weeks in a dixie cup and it seemed to be doing ok. I transplanted to a 1 gallon container a couple of days ago. I also transplanted the other plants and they have had no troubles whatsoever. The ww's lower leaves are yellowing/browning. It appears to be starting at the tip of another leaf too. There is tons of new growth taking place as well. I noticed the yellowing while watering this morning prior to heading to work.

Humidity is low. I can't seem to get it above 17% while running a small humidifier in the tent, it's 10% otherwise. Temps run from 21c with the lights off to 28c with them on. Soil PH is 7.0 and I'm watering with 6.5. I've just ordered a bigger humidifier from Amazon that should take care of the whole room. I've also invested in moisture meters and am using smart pots to help prevent my noob self from overwatering. Not sure if that could be it? I should also note that they are now in fox farm ocean forest soil, where they were started in a gentle potting mix. Maybe transplant shock? Pests? I'm at a loss.

Any help will be greatly appreciated, thanks!
 

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To me it looks like a potassium deficiency. 7.0 is on the high side of PH as well? Before you start trying to supplement K, I'd first look at your lights. Is this one particular plant getting more heat from your lights? Maybe you can exchange spots with another plant in your array and see if the problem resolves itself?(heat on leaves can replicate K deficiency symtoms)
 
6.2 is perfect for soil I think
 
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