Agave Leaf Damage: Nutrient Deficiency or Temperature Extremes

UK south coast agaves (6–7 yrs, 3×3 ft) show upper leaf surface stripped, dry, translucent; underside sap blobs; yellowing/rotting along blade. Affects old and young plants separately.

Possible Causes

• Potassium deficiency: Causes marginal necrosis on older leaves progressing inward.
• Extreme temperature swings: Can cause similar symptoms.

Action

Fertilize if not done in 2+ years. Monitor for environmental extremes. If neither fits, provide more details.