GreenThumb Lawn Fertilizer
Best winterizer for homeowners seeking stronger roots and early spring greening.
This is the ultimate insurance policy for your lawn, trading immediate growth for long-term root resilience. By prioritizing a slow-release nitrogen feed over a quick, fleeting pop of color, it ensures your grass survives the winter freeze and hits the ground running come spring.
$51.99
at
Starkie Bros. Garden Center
Who it's for
- Homeowners wanting a vibrant, early green-up after winter
- Gardeners living in regions with harsh, freezing winters
- Eco-conscious residents living near protected local waterways
Who should skip it
- Gardeners seeking a versatile, year-round lawn treatment
- Homeowners establishing new grass seed or fresh sod
- Beginners uncomfortable with precise spreader calibration
Performance breakdown
Nutrient Longevity
Sixteen weeks of feeding provides reliable support through the entire dormant season.
Coverage Efficiency
Fifteen thousand square feet of coverage handles most residential lawns with ease.
Greening Potential
Added iron content ensures a deep, vibrant color during the transition months.
Root Development
High nitrogen formula builds a robust foundation for early spring growth.
Application Ease
Granular consistency allows for simple, even distribution with standard broadcast spreaders.
Release Precision
Half controlled-release nitrogen balances immediate impact with sustained, long-term nourishment.
Key Specs
NPK Ratio
32-0-10
Coverage Area
Up to 15,000 square feet
Nitrogen Release
50% Controlled Release
Micronutrient Content
2% Iron
Feeding Duration
Up to 16 Weeks
Fertilizer Source
Mineral Based
Season of Application
Winter
Target Plant Type
Lawn
Fertilizer Form
Granular
Release Type
Slow Release, Continuous Feed
Know before you buy
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