WTFMan
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dont you think 1000 ppm in veg is a bit extreme,better at 450 i would think,i asume your using the 500 scale of the hannah chartHey there. Ive been growing for a decade now and with little issues. Now, i am starting to experience some issues and I came here to the forums for some help from experienced growers. Here is my setup information
Nutrients: Nectar for the Gods (Gaia, Medusa, Dem(calcium), Aphro(mono potasium), Athenas(aminos), Herculean(cal-phosho), Zeus, Poseidon (kelp)
Using their nutrient chart
Soil : HP Pro Mix
2g & 10 G smart pots
Watering every 2-4 days in early veg - veg
every 2 days-ish in flower
Environmentally controlled veg and flower rooms 24 plants each room, perpetual grow, 48 total
Veg: x3 1000MH
Temp: 80F +/- 2F
Hum: 55%rh +/- 2%
PPM: 1000 +/- 100
RO water pH @ 6.2 - 6.4
Flower: x3 kind xl 1000 & x3 1000w HPS
Temps: 84F +/- 2F
Hum : 50% +/- 2%
PPM: 1500 +/- 50
RO water pH @ 6.2 -6.4 raised to 6.5 the last 2 weeks flower
The plants will start off looking great, nice green and healthy, no signs of stress, deficiency or toxicity. However, as flower progresses they will become more and more Deficient or toxic. This is the first time this has happened to me, so here I am asking for your help. I think that is all the info needed for a proper analysis besides being present in the grow. If i missed anything let me know. Thank you all for your time and energy.
Do you think this is a TOXICITY or DEFICIENCY and if so WHAT nutrient(s)
Thank you guys for your advice and expertise. Much appreciated.
I have not changed anything in my current setup, running just under 600sqft.
Speaking with Scott Ostrander(owner NfG), he suggested I slurry test, I did, and it come back at 5.8pH from veg plants and flower plants.
Scotts Response
"Can you get me some slurry numbers from the different stages. Maybe one or two from each stage?
I would like to see where the Promix peat moss pH is coming in at, as we have been seeing a lower pH peat moss out on the west coast lately. "
after i sent results to him
"Right there. 5.7-5.8 pH!
When the pH in the root zone drops below 6.0-6.1 then we start to see a calcium deficiency which also tends to bring other issues like potassium and magnesium issues.
I am guessing that the HP, is more acidic then usual this time and as it breaks down from microbial activity, the acids keep leaching out and are starting to compound and build up.
My first recommendation is to do one Herculean flush with 1 TBLS per gallon of Herculean, 1 TBLS per gallon Gaia, and ph that to 6.5 and water that in until you get 15%-20% runs off.
Then over the next few days, up to a week, continue your normal feedings but shoot higher on the pH so that we can start buffering that acidic pH. "
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