Another plant with some brown spots and leaves that are kind of wilting. I had a similar post about a different plant with good feed back about P deficiency but wanted to check this one. I watered yesterday with 5g MegaCrop, 1/4tsp Flower Fuel, 3ml CalMag to a gallon of water. Ph was 6.7 in and runoff was 6.2 so soil ph seems quite low. Should I just continue watering at a high ph close to 7 to bring levels up?
Phosphorus or CalMag deficiency?
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Another plant with some brown spots and leaves that are kind of wilting. I had a similar post about a different plant with good feed back about P deficiency but wanted to check this one. I watered yesterday with 5g MegaCrop, 1/4tsp Flower Fuel, 3ml CalMag to a gallon of water. Ph was 6.7 in and runoff was 6.2 so soil ph seems quite low. Should I just continue watering at a high ph close to 7 to bring levels up?
Raise the cal/mag to 1tsp per gal and continue feeding bloom nutes.
Sounds good. I'll bump calmag to 5ml per gallon!
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we need light info, type, distance,... T and RH% is there too,... It looks like a weird Ca defc. mainfestation, when it causes that necrosis right along the veins like that,... light proximity is often the culprit, or part of it at least,...
MC has Ca and Mg in it already, more Ca-Mg isn't always mandatory... and too much can cause lockouts of other nutes (including P), and ironically, each other!
MC has Ca and Mg in it already, more Ca-Mg isn't always mandatory... and too much can cause lockouts of other nutes (including P), and ironically, each other!
Lights are autocobs at 20"..now at 24"..six lights in a 4x4..one over each plant in there currently. Temps are 78 give or take a degree or two. Not sure on RH at the moment.
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That's some heavy blasting mate, I have only 3 in a 4 x 2 and it's plenty....I know some tout the 1/per plant thing, but past a point too much, even if it doesn't burn, will have negative consequences.... Such Ca defc.'s are driven harder by too much light, so consider removing 1 or 2 of them, and see if progression halts,... I'd say the Ca-mg inputs are a bit heavy, i have to look up what changes were made in this with the new MC2.0, but I'm pretty sure they raised the %'s in it..... that might make the additional Ca-mg redundant or is starting to overload the soil....
You know, looking harder at this, it's possible more than one thing is in play here,.. a much much rarer Mn defc. might be acting up, definitely some overlap in these symptoms,.. almost always, that's a simple lack-of issue, pH lock out of that is near 7.0+ which is uncommon for mediums to go alkaline.... and your run-off was acidic. Looks into getting a micronutrient supplement, like Earth Juice Microblast... Dose the soil, and you could get away with a foliar spray too, which is the fastest way into the needy tissues,... it would at least cover that base!
You know, looking harder at this, it's possible more than one thing is in play here,.. a much much rarer Mn defc. might be acting up, definitely some overlap in these symptoms,.. almost always, that's a simple lack-of issue, pH lock out of that is near 7.0+ which is uncommon for mediums to go alkaline.... and your run-off was acidic. Looks into getting a micronutrient supplement, like Earth Juice Microblast... Dose the soil, and you could get away with a foliar spray too, which is the fastest way into the needy tissues,... it would at least cover that base!
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