Okj
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Last 4 or 5 waterings were only 300-400ppm(130-140ppm comes from tap) of CalMag(Calcium nitrate plus Magnesium Sulfate 3:1 elemental ratio. I dissolve them separately and then mix A sol. Shake mix B shake to prevent cal precipitation.)Its def not burn or lock out, burn is on the tips of the new growth yellow to brown starting at the upper part of the plant. Lockout is when your plants look hungry but cannot uptake the food your feeding. Whats the NPK of your current feed? How much water and how often? Do you have a PH meter? pics of the entire plant would give a better idea of whats going on, stuff can start on the bottom or the top and that can be the sign to dictate the proper diagnosis
Thanks for the inputCut back on the calcium nitrate in my opinion
This ^^^Cut back on the calcium nitrate in my opinion
So do you think the nitro/cal is locking out the mag?That's a crazy amount of nitrogen... your ratios are way way way out... and definitely causing root and uptake issues..... in the proper ratios 100-120ppm of nitrates. You cal mag may even be an ammonium sourced nitrogen which is about 4x stronger than nitrate nitrogen.
I will also assume the PH is not in a good place given the ratios.
flush the plant very well with an enzymes preferably. 3x the pot volume
Between the ferts you have use the 20-20-20 about 400ppm to feed after the flush. You will want to do this right after the flush.
The plant maybe pissy for a few days and damage will not go away... affected leaves will get worse and die. New growth should improve in 3-5 days.
Reduce the light intensity by 25-50% for that period.
No need for cal mag with tap... maybe mag sulfate but no need for calcium.So do you think the nitro/cal is locking out the mag?
Yeah that tap water thing really messed me up when I began I tried rainwater , blah blah blah- ended up with a gallon of calmag I havenโt opened in well prolly a year . LolNo need for cal mag with tap... maybe mag sulfate but no need for calcium.
And yes high nitrogen will increase demand for magnesium, reduce availability of K that really can affect uptake and transportation of water.
Thanks for the reply aqua.That's a crazy amount of nitrogen... your ratios are way way way out... and definitely causing root and uptake issues..... in the proper ratios 100-120ppm of nitrates. You cal mag may even be an ammonium sourced nitrogen which is about 4x stronger than nitrate nitrogen.
I will also assume the PH is not in a good place given the ratios.
flush the plant very well with an enzymes preferably. 3x the pot volume
Between the ferts you have use the 20-20-20 about 400ppm to feed after the flush. You will want to do this right after the flush.
The plant maybe pissy for a few days and damage will not go away... affected leaves will get worse and die. New growth should improve in 3-5 days.
Reduce the light intensity by 25-50% for that period.
Before i used calmag plant's growth was stunted,developed rusty spots and burnt tips, new growth necrosis.No need for cal mag with tap... maybe mag sulfate but no need for calcium.
And yes high nitrogen will increase demand for magnesium, reduce availability of K that really can affect uptake and transportation of water.
Do not use KCL.Before i used calmag plant's growth was stintes,developed rusty spots and burnt tips, new growth necrosis.
After i used CalMag it respondes pretty good , resumed to grow and new growth was healthy.
Idk whats in my tap water of 140 ppm, also i don't exclude it from total ppm. It comes @7.45 ph and when i pH down it woth cirtic acid to 6.5ph ppm drops about 20-30 units, o guess some neitralisation happens.
What pure form of K do you recommend. I have muriate of potash(KCl)0-0-61 but i have not used it yet. Does cannabis tolerate chlorine from KCl?
I see. You wrote only ammonium so i thought pure CaAmmonium.
I mean in the cal mag... its a very small percentage but usually it's there.I see. You wrote only ammonium so i thought pure CaAmmonium.
Mine is pure CaNitrate from YaraLiva Calcinit 15.5N of Nitrate-N and 19% pure Ca
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