I transplanted into these 7 gallon pots from 2 gallon pots last weekend. Had them in the small pots maybe 6 weeks, and several times gave then Grow Big, which I always use at least half strength for the recommended dosage. I just used tap water all along but started using PH adjusting when I fed/watered last Tuesday.
Here's the thing with watering, in the smaller pots I flirted with overwatering because the top 2/3rds would dry out and the bottom super heavy and wet. Lost my clones last year because I kept thinking they needed water, after they died I saw the root system was very poorly developed. I'm a little hesitant to water until they visibly droop because I'm afraid of this happening again. Top of soil is bone dry, bottom seems heavy
Temps here lately have fluctuated from the 80's to around 100, which is normal and successful grows I've had in the past never seemed to be bothered by the heat