Could potassium deficiency be causing brown leaf edges?

Brown edges with yellow halo. Starts lower and spreads up. Common in flower. Fix: Use a bloom formula higher in K (Tiger Bloom, FloraBloom) Check pH — K locks out below 6.0

Could salt/nutrient burn be causing brown leaf edges?

Tips AND edges brown. Upper leaves affected. After strong feedings. Fix: Flush and reduce feed strength

Leaf IssuesModerate

Brown Edges on Cannabis Leaves

Brown, crispy edges on cannabis leaves usually mean potassium deficiency or nutrient burn — the pattern tells you which.

What it looks like

●Brown, dry edges around the perimeter of the leaf
●Yellowing between the brown edge and green interior
●Potassium def: starts on lower leaves
●Nute burn: worst on upper leaves

Quick diagnostic checks

1Check bottom leaves first — lower = potassium; upper = burn

2Flush if you've been feeding strong

Causes ranked by likelihood

1. Potassium deficiency

Most common

Signs

●Brown edges with yellow halo
●Starts lower and spreads up
●Common in flower

Fix

✓Use a bloom formula higher in K (Tiger Bloom, FloraBloom)
✓Check pH — K locks out below 6.0

2. Salt/nutrient burn

Common

Signs

●Tips AND edges brown
●Upper leaves affected
●After strong feedings

Fix

✓Flush and reduce feed strength

⚠️When to worry

Potassium deficiency in flower cuts bud size. Fix within a week.

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