The Grow Awards 2026 🏆

Dark spots on leaves.

Evoluto
Evolutostarted grow question 3y ago
Does anyone know why my plants are getting dark spots on the leaves and how I could treat them?
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Week 8
Leaves. Color - Dark-brown
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GrowingGrannie
GrowingGrannieanswered grow question 3y ago
Can you give us more information in your diary? That would help US help YOU...
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DutchDoobie
DutchDoobieanswered grow question 3y ago
High Evoluto, This is a calcium deficiency in the early stage. You need to add some cal/mag with your nutrient solution. When your cannabis plant has a calcium deficiency, the main symptom that you'll be able to notice is brown or bronze splotches or spots on your leaves. It is also often associated with yellowing Goodluck bro! 😋
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ernest_twwg
ernest_twwganswered grow question 3y ago
Looks like the nugs have purple in them, so it could just be the leaves fading. It could also be a phosphorus deficiency, though. Give it some rock phosphate and keep an eye on it. If it starts clearing up, it was a phosphorus deficiency. If it sticks around, it's genetics and/or fading. I hope this helps.
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seEdcork
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Help! What is this?! Upper leaves turning yellow/brown but not the lower ones. Light burn?
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Leaves. Color - Yellow
Leaves. Color - Dark-brown
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