Rock Phosphate
Type: Mineral Release: Very slow NPK: 0-3-0 (varies)
Natural phosphorus source that releases slowly, best in acidic soils and with microbial activity.
🎯 What It's Best For
- fruiting and flowering
- long-term soil building
🚫 Not Ideal For
- alkaline soils (low availability)
🧪 Application & Dosage
Method: Incorporate into soil; combine with compost.
Rate: 100–200 g per m²
Timing: Pre-plant or bed preparation
Frequency: Every 6–12 months
⚖️ Soil & pH
Soil pH Preference: acidic (pH < 7)
⚠️ Cautions
Slow effect; test soil P before reapplying.
🏷️ Tags
phosphoruslong-term
Note
Values are typical approximations. Always follow your specific product label and adjust for pot size, plant type, and local weather. In containers, flush with plain water occasionally to prevent salt buildup.