Down to Earth Island Phosphate
Best organic phosphorus source for serious flower and fruit gardeners.
A potent, fossilized source of phosphorus that jumpstarts bloom and fruit production. Its high humus content improves soil structure while offering a flexible, water-soluble option for both soil drenching and foliar feeding.
$24.99
at
Grow Organic
More Island Phosphate options
Who it's for
- Gardeners focusing on vibrant blooms and strong root systems
- Organic growers seeking environmentally friendly soil amendments
- Low-maintenance hobbyists wanting consistent feeding throughout the growing season
Who should skip it
- Users sensitive to airborne particles or those working in breezy areas
- Beginners looking for a single, all-in-one feeding solution
- Growers needing an instant rescue for severely stressed plants
Performance breakdown
Bloom potency
The high phosphorus concentration delivers aggressive support for heavy flowering cycles.
Soil enrichment
Humus-rich composition actively improves soil structure and long-term microbial health.
Application versatility
Easily transitions between dry soil amendment and liquid tea applications.
Nutrient availability
Immediate release profile provides a rapid fix for phosphorus-deficient plants.
Organic integrity
Certified organic status ensures clean, sustainable inputs for edible gardens.
Ease of handling
Fine texture can be dusty, requiring careful handling during windy conditions.
Key Specs
Weight
5 lbs
NPK Ratio
0-11-0
Organic Status
Certified Organic (CDFA, USDA)
Fertilizer Type
Water-Soluble
Nutrient Release Rate
Immediate (0-1 Months)
Application Rate
5 lb/100 sq ft
Animal-Based
Yes
Primary Benefit
Boosts Microbial Activity
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