Hi Shorebilly,
With the fast growth rates I don't see the need to folier feed at all. It is becomming more pervelant, but I suspect this is because of the hydroshops selling kits with instructions for folier feeding and selling more suppliments
Watch for nutrient burn with low humidity, I've just been caught unawares by this and burnt the whole grow
I usually increase RH manually, by spraying water in the inner walls of my small space but had some access issues where I couldn't do it and suffered the burn. I'm going to hang wet towels in there until the plants recover to sufficient size where the RH is kept up by the transpiration. I will consider dropping the nute strength when I can't raise RH in future.
pH 6.5 is a little high for starting IMO, recomended range for hydro is 5.5 - 6.1, I start at 5.8 monitoring, topping up and adjusting daily.
San
