I always have watered after a transplant with a little of superthrive, hygrozyme, and Greatwhite always in the mix during veg., and alittle into flower. dry roots are dead roots. No doubt that you need time in between water to absorb and dry out. The 20 gallon pots I use, have gone about a week in veg, no more than 3 days in flower. I also use griffins spinout(coper hydroxide) to force the roots back into the middle, increasing surface area. If you have ever dug around after a harvest, you have undoubtedly come accross a large area in the middle of the medium with just your main taproot, and axial roots that put out feeder roots upto 5 inches away from taproot. That is a lot of unused medium. Then they just circle the pot. Griffins will help tremedously. Big roots, big plants. Pulling just under 400 grams of one plant. 3 month veg 3 month flower last winter, super sliver haze, tricky feeder. any way here are a couple more grow pictures. as well as a couple for eye candy.
just at 21 days flower.