Cat Urine in Garden Beds: It's the pH, Not Ammonia, That Hurts Plants

Cats peeing in garden; plants stunted/dying. Owner asks if ammonia can be neutralized or soil replaced, and for a cat deterrent.

Ammonia Isn't the Problem

Ammonia quickly converts to plant-available nitrogen. The real issue: uric acid lowers soil pH, locking up nutrients.

Fix

• Soil test to determine lime needed.
• Apply lime accordingly—no need to replace soil.

Deterrent

Dust plants and area with cayenne pepper—effective for cats.