I'm using the GH flora series light feed schedule. I'm on week 2 of flower. I already use 2.5ml/gal of calmag. And my input ph is always between 5.8 and 6.2 and my run off ph has been around 6.1 consistently. I fertilize twice a day with at least 20% runoff. Conditions are usually 65 to 80 degrees and around 50% humidity on average. I have been having ongoing issues with top growth having interveinal discoloration and brown spotting so I suspected calmag deficiency or lockout and tried flushing then a higher dose of calmag and then tried a lower EC and neither seemed effective. My run off EC was coming out high but after lowering the dose it seems to have settled at its current input of 1.2 and run off of 1 to 1.1
Hey, thanks for the pics!
I am just going to think out loud here…
First make sure you don’t have any pests or disease, it was hard to tell in pictures.
Need to get stable environment in range
Day temps: 77-80
Night temps: 70-72 (65-68 last week flower)
Humidity: 55-60%
C02: 900-1200ppm
Ppfd week 2 flower: 700ish (about 3-4’ away from light, but can usually find out exactly with light brand name by checking specs from manufacturer.) Should be using high quality LED or HPS, or halide/hps mix. I highly recommend getting a pulse, will give you all the data you need to be successful with the environment.
Couldn’t really tell pot size, but as long as the coco isn’t staying soaked and isn’t drying out, 2 feeds a day should be ok for that plant size, but adjust accordingly. You don’t want a small struggling root system in soaking wet media. Or a large root system in a dry media. Make sure your drip system is clean.
The flora series works in coco but i think there are much better coco specific options like canna or house and garden. Many people including myself have made custom mixes with botanicare or millennium or whatever with amazing results, but the coco specific stuff is just easy and you can add to it and branch off from there.
You probably know that Coco specific nutrients have lower potassium and higher cal-mag to account for coco unique properties. I will say that the flora series seems to have plenty cal-mag though, but Npk ratios may not be ideal.
So need to adjust the 3 part to bring more in line with coco. Stop using the grow, that gets us down to a 5-5-5 evenly mixed. We got our 5% calcium, nitrogen and micros from the micro and we have our PK/sulfur and 1.5% magnesium from bloom. We just need to up the PK for flowering. So you might do 5ml micro and 10ml bloom per gallon and adjust from there. A popular mix is 8 micro/16 bloom, just not sure your plants can take that much yet, but hard to tell size from pics.
No need for cal mag, just increase each bottle by that same ratio (2:1) if you need more, same thing for less. Personally I’d also add in some additives like great white, armor si, diamond nectar, flora blend, flora nectar, and floralicious bloom at a low dose of 1-2ml/gal each for some improved terps. Dont want to spike ec with those though. Cut out si week 3 flower.
Watch that runoff ec and ph to make sure nothing is getting out of wack and watch for over fertilization like dark green leaves with burnt tips. I would target feedings of 1.3-1.5 EC for smaller plant, 1.5-1.8 for bigger plants. When that runoff comes out .3 ec higher then input, flush with 5ml calmag and great white until runoff ec is .1-.2 lower then that weeks feed EC. then restart feeds. If runoff consistently comes out lower up the nutrients by a little bit at a time in that above ratio. You can also the ratio as you get to know the plants a little bit if needed. Hope that helps!
