Island Phosphate Hi P 0-11-0 (5 lb Box)
Best organic phosphorus source for home gardeners seeking robust plant development.
Boost your plant's growth with Island Phosphate Hi P, an organic fertilizer derived from ancient seabird guano. This 5 lb box delivers readily available phosphorus, essential for robust plant development, and acts as an excellent soil builder due to its high humus content. Apply it directly into the soil, as a foliar spray for maximum effectiveness, or prepare a guano tea for use in fertigation and drip systems. Ideal for lawns, vegetable gardens, and ornamental plants, it provides a natural, effective way to enhance plant vitality and soil health throughout the growing season.
$24.99
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4448
#50 in Fertilizers
Price vs Category Average
-59%
Below average
NPK Ratio
0110
/ --
Who it's for
- Plant owners worried about accidental fertilizer burn
- Gardeners seeking stronger roots and more abundant blooms
- Organic growers prioritizing natural inputs and soil health
Who should skip it
- Gardeners wanting a simple, all-in-one nutritional solution
- Growers needing an immediate fix for acute nutrient deficiencies
- Gardeners with alkaline soil conditions
Performance breakdown
Nutrient Concentration
High phosphorus content provides a potent boost for root and bloom.
Application Versatility
Easily adapts to soil, foliar, or liquid tea delivery methods.
Soil Health Impact
Rich humus content actively improves soil structure and long-term vitality.
Organic Integrity
Sourced from natural fossilized deposits for clean, sustainable garden growth.
Ease of Preparation
Requires steeping time for liquid use, unlike instant synthetic fertilizers.
Release Speed
Quick-release formula ensures plants receive immediate access to essential nutrients.
Key Specs
NPK Ratio
0-11-0
Package Weight
5 lb
Source Material
Fossilized Seabird Guano
Soil Application Rate
5 lb per 100 sq ft
Tea Preparation
Steep 3-5 lb in 5-10 gal of water for 1-2 days
Fertilizer Source
Organic, Natural
Coverage Area
100 sq ft (at 5 lb rate)
Nitrogen Percentage
0%
Features
- High in readily available phosphorus
- Effective soil builder with high humus
- Maximizes effectiveness as a foliar spray
- Versatile application methods
- Derived from natural seabird deposits
- Supports robust plant development
- Suitable for various plant types
- Organic and natural source
What customers say
Customers consistently praise the exceptional quality and effectiveness of this high phosphorus fertilizer, noting significant improvements in flowering and root structure. Gardeners appreciate the reliable boost it provides, especially when preparing soil for heavy bloomers. The consensus highlights its excellent value, as a small amount yields dramatic, visible results, making the 5 lb box a worthwhile investment for organic gardening enthusiasts seeking robust plant health.
Know before you buy
This fertilizer provides a concentrated source of phosphorus, which is essential for strong root development, flowering, and fruit production. Because it is derived from fossilized seabird guano, it also adds beneficial humus to your soil, improving overall soil structure.
Yes, because this product contains no nitrogen or potassium, it is intended to be used as a targeted phosphorus supplement. If your plants require a complete nutrient profile, you should pair this with a nitrogen-rich fertilizer or a balanced organic blend.
Yes, you can prepare a guano tea by steeping 3 to 5 pounds of the granular fertilizer in 5 to 10 gallons of water for 1 to 2 days. Once brewed and strained, the liquid can be used in fertigation or drip systems.
At the recommended application rate of 5 lbs per 100 square feet, a single box will cover exactly 100 square feet of garden or lawn space.
No, Island Phosphate Hi P is a granular product and is not fully water-soluble. While it can be used to create a tea for liquid application, it will not dissolve completely like a synthetic liquid fertilizer.
This product is versatile and can be applied during any season, including spring, summer, fall, and winter. It is best used when your plants are in a growth phase or when soil testing indicates a phosphorus deficiency.
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$25