Low-Nitrogen Slow-Release Fertilizers for Cacti and Succulents

Ideal Ratio: 1:2:2 or Similar (Low N, Higher P & K)

Cacti need minimal nitrogen to avoid soft, etiolated growth. Look for:

• 5-10-10 (widely available in 5-lb bags at garden centers).
• 10-18-20 lawn fertilizer (same 1:2:2 ratio, more concentrated—use half the rate).
• Tomato/vegetable fertilizers (e.g., 5-7-8, 4-8-12) often fit this profile.

Slow-Release Options

• Osmocote Plus 15-9-12 (5–6 month) – moderate N, good micros.
• Nutricote 13-11-11 (180-day) – balanced but lower N than standard.
• Custom blend: mix 5-10-10 with polymer-coated urea at 1:4 ratio.

Application

Apply once in early spring at ½ label rate. Cacti in gritty, fast-draining media need very little fertilizer—overfeeding causes more harm than underfeeding.