Best Simplot Amm Phosphate 16-20-0
Best fertilizer for gardeners seeking stronger roots and healthier soil structure.
Enhance your garden's health with Simplot Amm Phosphate 16-20-0, a synthetic granular fertilizer designed for optimal plant growth. This formulation boasts a high concentration of phosphate for robust root development and significant sulfur content to improve soil health. The nitrogen is provided in an easily absorbed ammonium form, working synergistically with phosphate to boost nutrient uptake efficiency. It also contributes to better soil structure, making it more friable, improving moisture penetration, and aiding in the breakdown of organic residue for a thriving garden.
$57.77
Owner Satisfaction
4.7
/ 5
Category Rank
50
/ 4438
#50 in Fertilizers
Price vs Category Average
-6%
Below average
NPK Ratio
16200
/ --
Who it's for
- Gardeners establishing new plantings or early-season crops
- Growers seeking a quick green-up and robust root start
- Farmers focused on soil health and improved crop yields
Who should skip it
- Beginners needing a low-risk fertilizer to avoid root burn
- Gardeners growing plants that require potassium for flowering or fruiting
- Horticulturists managing soil with already low pH levels
Performance breakdown
Root development potential
High phosphate concentration drives aggressive and healthy root system establishment.
Nutrient absorption efficiency
Ammonium nitrogen form ensures plants access nutrients quickly and effectively.
Soil health impact
Significant sulfur content actively improves soil structure and moisture penetration.
Application speed
Quick-release granular formula delivers immediate results for hungry garden beds.
Residue breakdown capability
Active chemical composition helps decompose organic matter for better soil tilth.
Versatility of use
Specialized NPK ratio is best suited for targeted root-focused growth cycles.
Key Specs
NPK Ratio
16-20-0
Total Nitrogen (N)
6.000%
Available Phosphate (P2O5)
20.000%
Soluble Potash (K2O)
0.00%
Sulfur (S) Content
13.000%
Package Weight
50 lb
Nitrogen Form
Ammonium
Fertilizer Type
Ammonium Phosphate
Features
- High phosphate for strong root systems
- Rich in sulfur for soil health
- Ammonium nitrogen for efficient uptake
- Improves soil structure and moisture
- Aids in residue breakdown
- Promotes efficient nutrient utilization
What customers say
Customers consistently praise the Simplot 16 20 0 for its exceptional effectiveness in promoting vigorous plant growth, especially early in the season. Reviewers frequently highlight the reliable nutrient balance, noting significant improvements in crop yield and root health. The consensus is that this fertilizer offers outstanding value, delivering professional grade results without unnecessary complexity.
Know before you buy
The 16-20-0 ratio indicates that this fertilizer contains 16% nitrogen, 20% phosphate, and 0% potash. The high phosphate content is specifically formulated to support strong root development, while the ammonium nitrogen provides a readily available energy source for early plant growth.
With 13% sulfur, this fertilizer helps improve soil health by aiding in the breakdown of organic matter and assisting in nutrient uptake. It is particularly useful for soils that may be sulfur-deficient, helping to create a more balanced environment for root systems.
This is a quick-release synthetic fertilizer. Because the nitrogen is in an ammonium form, it is designed to be absorbed by plants relatively quickly, making it ideal for situations where you need to provide a rapid nutrient boost.
This product is best suited for plants that require a significant boost in phosphorus and nitrogen, such as during the establishment phase or for crops that benefit from root-strengthening. Since it contains no potassium (0% potash), you may need to supplement with a different product if your soil or specific plant variety requires a complete NPK balance.
Beyond providing nutrients, the chemical composition of this fertilizer helps improve soil friability. This makes the soil easier to work with, improves moisture penetration, and encourages the breakdown of organic residue, which creates a better overall environment for root expansion.
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$58