Overexposure or nutrient issue? Yellowing leaves

You could have gotten her a little wet but because it is affecting the lower leaves first probably nitrogen deficiency not toxicity. If you have been giving her ample nitrogen then a magnesium deficiency would be the next best bet. To fix it add one tablespoon of epsom salts as a top dress before the next watering cycle. But read a few more answers before making your best educated decision. Happy gardening

Hi, there are 2 reasons I would say this could be the case. 1. If you're still spraying water on the leaves like in the photos, it could be burns. 2. If you're not doing that anymore, I would strongly suspect a CalMag issue. Because at a pH of 7, the uptake of calcium and magnesium by the plants can be impaired, as these nutrients are more available in slightly acidic conditions (pH 6.0–6.5). The wrong pH also leads to the blockage of other nutrients, and you'll keep having more problems. So adjust the pH, no more water on the leaves, and add some CalMag to your feeding schedule. Good luck :)

Slight burning from excessive nitrogen content in the soil. Also, try and keep the leaves dry, there is no need to spritz the leaves...........wet leaves can lead to diseases. Liquid, cannabis specific fertilizers are much better and easier to control than any dry amendmant. Unfortunately, I have seen far too many negative issues in this forum with the product you have chosen.

Leaf's surface temperature directly changes depending on its transpiration rate, with higher transpiration rates leading to a cooler leaf surface temperature because the process of water evaporating from the leaf absorbs heat energy, effectively cooling it down; conversely, when transpiration is low, the leaf can become significantly warmer than the surrounding air. Based on a 3-degree F difference in ambient and LST. 1.44kPa. @80-50% Drop 2F and raise 5% will give you 1.18kPa.

I'm far from a professional... if this in veg, and your recording environment readings of 80F at 50% RH... that's a very high VPD reading of about 1.8kPa. You should be at about 1.2kPa max and this can be achieved be either lowering your temperature, or raising your humidity (I say raise the humidity). At the current vpd, your plants are sucking up more water and nutrients than they can handle it healthy fashion. You are stressing the plants and what you're seeing in the leaves could actually be nutrient burn.

Ph 7 way to high..