Day 46 today so middle of week 7 on a 10 week flower time
I turned the light down to 50% earlier based on a gut feeling and few other reasons.
1. Grower friend at dispensary said something about sunlight losing intensity following August so turning down light intensity late in flower helps bring out terpenes
, idk but it sounds good LOL.
2. The unhealthy plant looks even more yellow today and it's mainly directly under the light. The side of the plant against the tent wall far from the light is still green so that tells me light may be part of problem
3. While still overall healthy and green, I noticed some spots on the healthy plant that might be very early stage of what the unhealthy one is doing.
Not sure if for better or worse but I increased the sensi bloom a & b from 1/2 strength to 5/8 strength as well as decreasing light from 60 to 50 %
Temps staying around 78-82 day and 68-70 night. Rh around 50-55 recently
Most current watering on the healthy plant tested runoff pH at 5.8 after watering in at 6.5