First time grower here! I’ve been following along with “7 Steps To Grow Cannabis”. I’m growing 2 AK Autos and 1 Blueberry Auto in a 2x4x4 grow tent under an LED using Fox Farm Ocean Forrest soil In 3 gallon pots. The temperature and humidity have always been in the perfect range according to the book. Currently temp is 78.4°F and humidity is 51.5%. Today is Day 30 since sprouting. I’ve been watering with slightly alkaline water around 7.9 (unknowingly because I didn’t yet have a ph reader) for the entire life of the plants until yesterday when I brought the purified water from my fridge down to 7.0 so I could check the runoff ph. I’ve been watering until I can see runoff since day 21, and before that I was just watering to keep the soil relatively moist, especially the top. I’ve also had an oscillating fan blowing on low, giving an intermittent gentle breeze since day 21. The runoff PPM reading was more than 1200 on each plant yesterday, which I know has to do with the soil and pre-conversion and bioavailability of the nutrients, etc. The runoff ph was 6.1 for each plant so I’m guessing that even if the water was too alkaline before, hopefully the runoff was still in a good range even though I hadn’t been checking? My problem is there is brown spotting on leaves and those leaves seem like they are drying and flaking off on the middle and lower parts of the plant. I just started noticing the brown spots about 3 or 4 days ago and mostly just on one plant, one of the AK Autos. Both the other AK and the Blueberry show just a tiny bit of browning. The one AK, however, is showing the worst of it, which from the beginning it was the plant that was always the biggest and fullest when compared to the other two. Is it browning because it’s bigger and requiring more nutrients at this time, and the other two aren’t far behind, or is it a ph issue? What do you think? ANY comments or suggestions are greatly appreciated.
.png)
Thanks for the details on your plant. It sounds like you did your research and have some good knowledge already. How often do you water the plant? Do you spray it with anything? Have you been inspecting for pests? I see the damage is on one side of the plant; do you have a fan or heater on that side of the plant? Often times damage can happen from equipment being too close.