Join Date: Aug 2017
Location: Off a dead-end dirt road, near a river, out of town, in the hills and trees
I previously used classic 600 pots (x 16 per cabinet) in several 4'x4' areas, then went to classic 1200's x 9 in 4'x4', then classic 2000's x 9. The smaller pots, in my opinion, had the plants putting more energy into top-side effort, than in to the roots, and kept them from getting water-logged for a shorter drying time between waterings, unless uptake slowed due to over-feeding..
The larger pots I had used years ago, but with the newer mix(es), and partly due to not gradually stair-stepping up the pot size, rather going from 3" to the final bloom pots, ran into issues with staying wet too long, and .... Fusarium Wilt, etc. Karma from laziness, to be honest.
I typically only give a boost of fertilizer when into bloom soil, then let it get water, or water and enzymes for a number of waterings. After that, 1-2 times weekly with medium strength feed, of what ever I'm using at that time; sometimes in the past, religiously using guano and kelp teas, and other times FF bits at half-strength.
Very seldom do I use foliar feeding anymore, unless cuttings, or I see a Mag deficiency or similar that can't be reached via root feeding (i.e. lock-out).
I don't even use foliar sprays as much as I once did for rinsing waste from the leaf tissue, though I should.
My HRV, even with the current bug screen at intake, and MERV 8 filters to keep debris away from the core, seems to be working quite well, and spring is more slow to arrive here this year than several past, thus my humidity in the shop is running about 28+ % (on the low side compared to normal, but it's been even lower through winter).
My temps, however, are right in there where I like them, at about 71 to 74 f. A bit higher than that in the 4'x4'x~6.5' cabinets. (4 cabinets total in the shop, plus 3 mother cupboards).
Reflective semi-gloss and flat 'pure bright white' latex enamel on the walls in the larger cabinets and mother cupboards, maximizing any light that goes to the sides.
Recently converted to 315 cmh's (last year), though one cabinet (3.5'x3.5'x6.5') still has the 400 digital and accompanying MH and HPS bulbs.
No soil test right now.
Part of the reason for the fairly serious variance in amendments is based in distrust for amendments matching what they claim on the labels, and anthropomorphizing/personification of plants. (i.e., if I ate the same meal all day, every day, for months on end, I'd be upset. I know that's not realistic where plants are concerned, but.....)