Brown Crunchy Edges? (Potassium Deficiency)
K issues show as burnt tips/edges and weak stems, often mid/upper leaves.
Potassium deficiency? Brown crunchy edges and tips—see causes and analyze fast.
Common Causes
- Low K in mix
- High Ca/Mg competition
- High salt locking K
- Late flower heavy demand
How to Tell Which One You Have
Brown crisp edges and tips; mid/upper leaves; stems weak.
FAQ
Add more PK?
Increase K carefully; avoid high EC.
Is this light burn?
Light burn hits tops evenly; K burn shows edge necrosis.
Can high Ca/Mg block K?
Yes, balance ratios.
Browse problem guides
- Interveinal Yellowing? (Magnesium Deficiency)
- pH Lockout? (Leaves Pale But EC Fine)
- Salt Buildup? (High EC, Burnt Tips)
- Yellow New Growth? (Sulfur Deficiency)
- Yellow New Leaves, Green Veins? (Iron Deficiency)
- Speckled New Leaves? (Manganese Deficiency)
- Twisted Small New Leaves? (Zinc Deficiency)
- Brittle New Growth? (Boron Deficiency)