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Removed started grow question 3 years ago
What is this white stuff on some of my leaves? I had very minor pH fluctuations. It got a little warm -- about 83 degrees F for a day or two. Water temps got up to 75 for an hour or so. Light is pretty close. Any ideas what this is?
Week 16
Techniques. Defoliation
Stick answered grow question 3 years ago
Hi @Chi_Town_White_Boy! I think you just named it: pH fluctuations, getting worst very quickly because of hot roots and maybe light stress (your new lighting setup could be involved). You can tuck the most affected leaves to increase light & air penetration (they won't recover) and double check that your pH-pen is calibrated, while trying to maintain decent temperatures in the air / in the solution. The spots should not spread as long as your pH is fine. Hope this will help, keep us up-to-date and happy growing :facepunch: