Great group. I’ve been at it since day one of legalization here in Cali. I prefer photoperiod strains. Gives me more time to get to know my plants.
Now that I’ve been at this for a while I’m going to try to really get it down. For background, I’m in a 4’x 4’ x 80†tent using 600w MH/HPS with 2, 300w Roledro COB LEDs to augment the HPS during flower. I have a brand new Sun Systems sealed/ventilated hood that I am running my iPower 4†190 cfm fan through and dumping the exhaust out a window and I still have trouble with heat. I struggle to keep the temperature between 80 to 85. I know that is high but I have to draw the line somewhere since electricity is my major expense. I’m growing in a DWC set up using RO and I do one plant at a time so that one plant gets all of my attention. I use GH Flora Trio nutrients with CaliMagic and HydroGuard. During past grows I’ve pretty much followed the feed chart found here on GWE and closey monitored PH with total disregard for ppm and always topped off with plain water. With nutrients at this relatively low level I experienced tip browning that was attributed here to nutrient burn which I am finding difficult to believe since my ppm’s we’re well under 500.
Recently I purchased a Blue Labs combometer so now I have access to a quality ppm meter. My current grow is a little Jack Herer girl that is entering week 13. So the stretch is over. All of this being said, during an earlier nutrient change, with everything in and ph set at 6.0, my ppm were 470 which is pretty low from what I’ve been able to gather these last couple of weeks. During last week’s change I kicked it up to 640 ppm. Today we’re up to 1000 ppm. So far so good. She’s thriving. Can’t wait to see how the colas fatten up.
Gotta love hydro.