Cal mag deficiency???

Coalcat

Coalcat

Well-Known Member
I was going to say with the heat you might want to back off the nutes a little. Raise the light of you can. Lookup mulder’s chart. I have not used your nutes. What’s your npk?
 
myke

myke

Well-Known Member
I’ve run into the same problem only on one strain and it only shows in rdwc. Played the Ca mg game switched to just adding epsom with my tap water. Nothing seemed to fix it. Buds were really small and had a dried up look. Tried a higher ph and a lower. Too much N to much P. I gave up and only grow that strain in coco now. The CEC is different in coco so my nutes work there. Here’s a pic of the same as you have. I hope you find out what it is as I’ve started several threads on it and I got no answers. I have yet to change to a different nute package so maybe that will do it. Good luck.
 

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Buddernugs

Buddernugs

Well-Known Member
myke said:
I’ve run into the same problem only on one strain and it only shows in rdwc. Played the Ca mg game switched to just adding epsom with my tap water. Nothing seemed to fix it. Buds were really small and had a dried up look. Tried a higher ph and a lower. Too much N to much P. I gave up and only grow that strain in coco now. The CEC is different in coco so my nutes work there. Here’s a pic of the same as you have. I hope you find out what it is as I’ve started several threads on it and I got no answers. I have yet to change to a different nute package so maybe that will do it. Good luck.
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Only thing I could think of is leaf rust fungi infection I sprayed 3%h2o2 on leafs did not help still spread
 
curious2garden

curious2garden

Well-Known Mod
Staff member
Buddernugs said:
I’m only at 725ppm (.5) I’ll back down to 600
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It's not heat stress. Routinely this time of year my canopy is over 100. I see a lot of heat stress.

Next it is a Calcium deficiency. Possibly with a bit of Magnesium deficiency. I run Gen. Hydro's product CaliMagic because I prefer the Ca:Mg ratio. At this point in flower I'm running 5 cc/gallon.

Also if 750 is your PPM with Ca/Mg additive I'd up it. I'd take my base nutrients to 800ish then add Ca/Mg supplement. The leaves that are damaged won't recover.
 
Buddernugs

Buddernugs

Well-Known Member
I ppm My ro water with cal mag to 350ppms the. The rest is a and b...... it was at 250ppms cal mag clearly it was not enough for this blue dream becuase every single plant has this now
 
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