yes i agree high temps , i had a very simmilar outcome white some widow when my temps were raised to the near 90's.
RhinoGrowUK Reviewed by RhinoGrowUK on . Discolored and twisted leaves The small leaves around the bud sites on all of my plants have started to turn dark and become twisted. The large leaves are not at all affected. I'm using the Lucas Formula, so this *shouldn't* be a nute use (but I'm not rulling that out). I just discovered this morning that the res temps are too high, so maybe that's the issue. Grow Details - DWC Drip Feed Hydro system Lucas Formula - GH based nutes - flowering profile - 920ppm pH - 5.6 and stable 6 - 42w "soft-white" CFL's over Rating: 5