Using Super Phosphate in the Garden: Targeted Phosphorus for Blooms

Super phosphate (0-20-0 or 0-45-0) delivers concentrated phosphorus for flowering plants.

Best Uses

• Spring/early summer application around flowering shrubs and perennials.
• Light sprinkle once per year—phosphorus is immobile and accumulates.
• Ideal for soils testing low in phosphorus.

Cautions

• Excess blocks iron, zinc, and copper uptake.
• Not a complete fertilizer—combine with nitrogen/potassium sources.
• Work into soil if possible; top-dressing is less effective.

Further Reading

See "Fertilizer Nutrients Overview" (Suite101) for detailed nutrient roles.