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cal-mag issue?
couplethatgrows420started grow question 3 years ago
Am I correct in thinking this is a cal-mag deficiency?
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Leaves. Other
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Dapper_Budsanswered grow question 3 years ago
Keep her at the same feed @8ml on next feed an bump ph going into substrate 6.0-6.5 ca+lmag better absorb at these ranges in soil substrate. This also show sign as ph fluctuations where your soil is ph stable at 6.3 but your hitting with 5.7 also he cause for the slight cal/mag slow uptake during fast growth. Hope this helps an happy growing!
couplethatgrows420answered grow question 3 years ago
just waterer a gallon with 8ml cal-mag and a half dose of dutch pro bloom A&B
ppm going in 768
ph going in 5.7
ph coming out 6.3
ppm coming out 1080
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CrystalMagicanswered grow question 3 years ago
I had a similar issue on my OG kush auto, just the bottom few leaves. It was resolved when I changed my water from 7.5 ph to 6.0-6.5 . I am using sohum soil with well water in autopots.
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BraveheartGeneticsanswered grow question 3 years ago
It does look like it but this could also be caused by pH fluctuations. Check all the obvious, substrate and water pH and make sure they are between 6-7. Anything outside of that and the plant struggles to absorb nutrients. I hope this helps, good luck and happy growing
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ThinLizzyanswered grow question 3 years ago
Rusty brown spots can be a sign of a magnesium or calcium deficiency, though they more commonly result from a lack of magnesium than calcium. With a calcium deficiency, you will likely also notice the lower leaves starting to curl.
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