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MaryJaneUSA started grow question 3 years ago
What are these little brown/rust spots on the big fan leaves? Cal Mag issues?
Afghan Kush DWC
9 weeks
Afghan Kush DWC MaryJaneUSA
Afghan Kush
10 comments · 2 years ago
Resolved
Week 6
Techniques. Defoliation
DissNoof answered grow question 3 years ago
Hey there : you got both deficiencies at the same time , the little rust spots that's calcium deficiency. I also see yellowing between the veins of the leafs and some yellowing on the edges of the leafs too : that's Mg deficiency. Typical hydro problem when you dont have enough chelation agent, either add some chelation agent or if you want to keep your feed schedule, try a foliar spray 3ml/L three times a week, it should actually be enough for the problem to stop spreading and the plant to recover. Hope this helps ! :rocket:
GreenHouseLab answered grow question 3 years ago
Yes my friend, Cal-Mag start introducing a good dose of Cal-Mag into your reservoir you'll see the deficiencies stop on newer growth after a week or so but affected leaves will remain damaged and not recover.