I started seeing these brown spots on the top and bottoms of a few of my leaves on one plant. i inspected the undersides with a loop and there doesn't seem to be pests under there... maybe a nutrient def??? anyone know what this is?
It could be a cal mag issue. The spotting is that similar to calcium and the yellowing on the edge of the leaf could be magnesium deficiency. It’s still a little early to tell. If the sports start to turn a rusty brown color then it’s definatly a cal mag issue. It could also be a potassium issue as far as the yellowing edges. If you aren’t using cal mag I would start to supplement the plant will a light feeding of cal-mag. As this deficiency is more common umoungst soilless and hydroponic grows. Hope this helps and good luck!
Hi @Goudasan! You're having a Calcium and/or Magnesium deficiency. This probably comes from a wrong pH in your waterings. Do you test the pH level of your waterings? As an emergency move, I would flush the soil with plain pH'd water (6.0) for 2-3 days and let the soil dry, then give it extra calcium and magnesium intakes by putting some Cal/Mag into your waterings. Hope this helps, keep us up-to-date and happy growing!