Down to Earth Island Phosphate
Best organic phosphorus source for serious home gardeners and flower enthusiasts.
A potent, organic-certified phosphorus source that drives explosive flowering and fruit development. It offers flexible application methods, allowing gardeners to mix it directly into soil or brew it into a liquid feed for targeted delivery.
$31.99
at
Esbenshades (Authorized retailer sold on Target/third-party)
More Island Phosphate options
Who it's for
- Gardeners seeking explosive blooms and strong root systems
- Eco-conscious growers prioritizing sustainable and organic soil amendments
- Low-maintenance planters wanting steady nutrient delivery over time
Who should skip it
- Users sensitive to airborne particles or working in windy conditions
- Impatient hobbyists requiring immediate visible results for struggling plants
- Landscapers managing high-pH soils without prior acidification
Performance breakdown
Bloom Stimulation
High phosphorus content delivers a noticeable boost to flower production.
Organic Compliance
OMRI listing ensures strict adherence to organic gardening standards.
Application Versatility
Easily adapts to soil mixing, side dressing, or liquid steeping methods.
Nutrient Bioavailability
Added humic acids significantly improve plant uptake of essential minerals.
Calcium Enrichment
Substantial calcium content supports strong cell walls and overall plant structure.
Ease of Integration
Granular texture blends smoothly into potting mixes without creating dust clouds.
Key Specs
NPK Ratio
0-11-0
Available Phosphate (P2O5)
11.0%
Calcium (Ca)
20.0%
Non-Plant Food Ingredients
2.5% Humic Acids
Organic Certified
Yes (OMRI Listed)
Package Weight
5 lbs
Application Rate
2.5-5 lbs per 100 square feet
Derived From
Phosphate Rock and Leonardite
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