Growing the Rainbow

Well we discovered that the light timer malfunctioned last week and we ran half the week with 24hr light. So this is now the first full week of 12/12 lighting. The ladies responded nicely and continue into full stretch. We added a 6"x6" netting about 12 inches above the other one. The light was also lowered to around 15". There was a slight lightning/yellowing of the leaves, but has seemed to mostly clear up. It could have been the odd lighting schedule mishap or a nutrient/PH/Water issue between watering. We did a fair amount of defoliation in the upper canopy to allow for better light penetration. I'm wondering it was too much or not enough. Time will tell. Night time Humidity is a constant battle now. The tent has 2 small dehumidifies, a tower fan and 6" inline vent. I'm afraid to let the vent fan run all night, as it drops the night time temps, below 50. As the buds stack however, we may have no choice.