I recently had a nutrient burn problem, which I addressed by switching reservoirs and lowering nutrient ppms from 700ish down to about 500. My plant leaves seem to be yellowing. I noticed this morning that somehow the ph had dropped to about 4.1! So I brought it back up to the regular 5.5-6.3. Could the leaves have turned yellow due to low ph, or could it be something else? I'm about 8 weeks into flower with a pure landrace sativa (Durban Poison). I seem to be haveing one problem after another. Ugh...
Plant leaves not doing well. Please help!
- Thread starter Beavercat
- Start date
im4satori
Well-Known Member
the good news is they buds look good despite all the nutrient imbalances
how long do you intend on running them? 10 weeks? 12 week?
tell me about your fertilizer
what brand?
what are the npk and calcium and magnesium % amounts for each bottle
how are you mixing the nutes? as in how many mls per gallon
whats the medium
take another pic further away to show the entire plant
how long do you intend on running them? 10 weeks? 12 week?
tell me about your fertilizer
what brand?
what are the npk and calcium and magnesium % amounts for each bottle
how are you mixing the nutes? as in how many mls per gallon
whats the medium
take another pic further away to show the entire plant
It is general hydroponics trio, and at this point, I am doing a 1,2,3 ratio. About 7.35 ml flora micro, 14.7 ml flora gro, and 22.14 ml flora bloom. I use ph up and down from them too. Right now it is at about 5.9 ph, and 600ppm in 3 gallon reservoir with a 450 watt led main light and 2 100 watt supplemental led. I am going to grow them as long as I can, but I want it to produce more psychedelic high than stoney high, so probably leaning towards 10 weeks.
This is the only chart on the npk ratios I could find as I am not home now, but this seems about right.
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Johnei
Well-Known Member
Satori will be able to tell you exactly the NPK Ca Mg values for those quantities and mixture. 
In last pic I See Potassium deficiency, Phosphorus deficiency, and Nitrogen deficiency, and this all could of been caused by the pH 4.1 lockout of all macronutrients. Old damage will not go away get better, now that you've got pH in check, look to the new growth for signs of improvement, old damage is there for life now., so dont look there for signs of improvement, only that the problems will halt in their tracks. But still, I'd wait for the Satori man to help you figure out your nutrient concoction you're mixing now before you go changing any other factors.
In last pic I See Potassium deficiency, Phosphorus deficiency, and Nitrogen deficiency, and this all could of been caused by the pH 4.1 lockout of all macronutrients. Old damage will not go away get better, now that you've got pH in check, look to the new growth for signs of improvement, old damage is there for life now., so dont look there for signs of improvement, only that the problems will halt in their tracks. But still, I'd wait for the Satori man to help you figure out your nutrient concoction you're mixing now before you go changing any other factors.
im4satori
Well-Known Member
wow man that's some hot fertilizer your mixing
is that per gallon?
not sure why your only getting a 700ppm reading on your pen if your mixing that much per gallon
that's why your having so much trouble
I will hit you back in a couple minutes with an appropriate mixing formula to use for your next grow
go ahead and begin with flushing those plants with plain ph'd water on the next watering schedule and only water them plain water unitl you harvest
idk maybe that's for the 3 gallons
is that per gallon?
not sure why your only getting a 700ppm reading on your pen if your mixing that much per gallon
that's why your having so much trouble
I will hit you back in a couple minutes with an appropriate mixing formula to use for your next grow
go ahead and begin with flushing those plants with plain ph'd water on the next watering schedule and only water them plain water unitl you harvest
idk maybe that's for the 3 gallons
im4satori
Well-Known Member
still if its that much per gallon it would be a very large number
I have a feeling , or I hope he ,meant for his 3 gallons mix and not "per gallon"
I am not home at the moment, so I am not sure the exact amounts,
It was pretty hot at one point. I had it up to 850ppm, and that was when the nute burn occured. I diled it back to 500 to 600, and that I am not doing it per gallon. I am doing that concoction for the entire 3 gallons.
im4satori
Well-Known Member
that makes sense
stnr420
Well-Known Member
Gotta stay on top of that ph man....looks like lockout from the ph issue