Hey Gro, Awesome production with those cmh lights. I am a hobby grower as well and am just about finished with my first actual room. I learned to grow indoors with a two stage cab I built, so this new room will be a real treat and I can now grow some bigger plants. One of the recent purchases I made for my lighting was the LEC 630 from Sun Systems, so after some web searching for grow journals, I stumbled upon yours. The reflector uses two 315W bulbs. Although, one could argue about the overlap between the bulbs may create hot spots, I think I can manage. The height of the reflector is also a lot thinner than the vertical 315W. Due to my flowering space, 3.5'W x 3'D x 7'H, I thought this was more efficent than two of the LEC 315s. One issue I've been having lately though is nutes. It seems I can't get it dialed in right. I can't get the right schedule down.
So I am seeking some advice as to what your feeding schedule is with these lights. I read on your other thread that you use Sensi nutes to supplement your mix, but at what frequency? Every watering...every other...? Do you gradually increase ppm each week?
Nute scheduling is the only area I struggle in right now. Everything else I have pretty well dialed in. Every 4-5 cycles I will get a plant or two that likes to fade its leaves by week 4-5 of flowering which reduces my yield. I'm guessing underfeeding or lockout.
I use 60/40 Pro-Mix/Perlite soil and toss in some blood meal, bone meal, earthworm castings, and some Happy Frog All-Purpose dry fert. I let that cook in large bins for at least 1 month, then transplant my ladies in this mix 1-2 weeks before going to the flower chamber. I have been using up the last of my Pure Blend Pro nutes, and a buddy gave me some Sensi A+B to try out with the new room. I usually feed every weekend, then regular water during the week. Most times I don't have issues, but like I said, every once in a while plants start fading yellow, or getting yellowing on the outer edges.
Thanks for any tips and great work with those lights!
Also, in your experience are larger pots really that much better? I was planning on running 2-3 foot plants in 3 gal pots, but notice you use 5. Even though the roots don't 'fill' up the pot, do they produce better with that extra root space?
Sorry for the wall of text. You have a setup that is similar to my new one so I want to learn all you know!