Leaves turning white! Please HELP!
- Thread starter myad
- Start date
Roger A. Shrubber
Well-Known Member
more info please
looks like you're outside in a greenhouse?
what are your temps, rh, airflow?
if its not outside, what lights and how far?
hard to say anything right now, but it looks like heat stress, possible light burn, and a sulfur def., all combined. just a guess at this point, though
looks like you're outside in a greenhouse?
what are your temps, rh, airflow?
if its not outside, what lights and how far?
hard to say anything right now, but it looks like heat stress, possible light burn, and a sulfur def., all combined. just a guess at this point, though
baxbax
Active Member
Do you use too much calcium ? try to lower ph to below 6.0 because trace elements best absorb at lower ph , but if you use too much calcium it cause iron deficiency ,
1) ph below 6
2)check your calcium fertilizer
one I had iron deficiency I lowered ph to 5.5 and cut my calcium feed and Iron def fixed soon. once I overdo in calcium food Iron deficiency takes home in leaves .
1) ph below 6
2)check your calcium fertilizer
one I had iron deficiency I lowered ph to 5.5 and cut my calcium feed and Iron def fixed soon. once I overdo in calcium food Iron deficiency takes home in leaves .
Well, first happened in the grow room, yellowing at the new leaves, not only tops, but the bottom ones.Growlight - Phantoms at 600W, 5 feet high. I turned off those and put the leds on thinking of heat stress or burn. Then moved those to the greenhouse and they continue yellowing and now look like the pics. Sprayed with Plant Therapy for spider mites
with 5.8 ph. The weird thing is that today happened again, sprayed in the growroom new plants and few hours later same thing, posting pics.. last time it started the same way and it got only worse, no matter what I try! Please help me Thank you!
Zephyrs
Well-Known Member
It almost looks like light burn, not a nute deficiency. Possible moving them to the greenhouse was to much sunlight to quickly. I have similar prob with white leaves it's a shock response and the chlorophyll won't come back much. Pic below is a clone six weeks into flower now and got minor light burn in veg stage. Because I didn't harden it slowly enough. Hope that helps 
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Hey guys, thank you all for your respond! Anyway, I figure out what was going on! I sprayed them with Plant Therapy and Safer for spider mites and Safer actually burn them! I also find out that some of my plants have a root rot problem, so there you go! I start treating them with Actinovate for root problems and watering with Hydroguard and Heavy roots, plus sprayed them with clean water and they look much much better!
Imo what he said.
PH??????
Seems too low. Potassium / magnesium / sulphur will lock out if ph is too low.
Try getting it above 6.