The Old Farmer's Almanac Tree & Shrub Fertilizer Spikes
Best slow-release fertilizer for busy gardeners maintaining established trees and shrubs.
Nourish your established trees and shrubs with The Old Farmer's Almanac Tree & Shrub Fertilizer Spikes. This naturally formulated product delivers a balanced 13-3-3 NPK ratio for vigorous growth, healthy blooms, and strong roots. The package includes 12 five-inch spikes designed for easy application by hammering directly into the soil. Derived from natural ingredients, these slow-release spikes provide consistent nutrition throughout the entire growing season, ensuring your plants receive the essential nutrients they need to thrive.
$23.95
Owner Satisfaction
4.5
/ 5
Category Rank
3039
/ 4348
#3039 in Fertilizers
Price vs Category Average
-61%
Below average
NPK Ratio
1333
/ --
Who it's for
- Busy gardeners seeking a low-maintenance, set-it-and-forget-it feeding routine
- Eco-conscious growers aiming to reduce fertilizer runoff and waste
- Novice plant owners wanting foolproof, mess-free nutrient application
Who should skip it
- People needing rapid recovery for plants showing immediate nutrient stress
- Gardeners with rocky, compacted soil or limited physical strength
- Owners of mature trees with extensive, wide-reaching root systems
Performance breakdown
Application Convenience
The hammer-in design eliminates digging and simplifies seasonal feeding routines.
Nutrient Delivery
Slow-release formula ensures consistent growth without the risk of fertilizer burn.
Formula Balance
The 13-3-3 ratio provides a strong nitrogen boost for leafy development.
Soil Integration
TruSpike design penetrates most soil types with minimal physical effort.
Ingredient Quality
Reliable nutrient sources provide essential support but lack organic certification.
Seasonal Longevity
One application effectively sustains tree health throughout the entire growing season.
Key Specs
NPK Ratio
13-3-3
Package Contents
12 Spikes
Spike Length
5 Inches
Nutrient Source
Corn Gluten Meal, Urea, Muriate of Potash, Ammonium Phosphate
Manufacturing Origin
Made in the USA
Nitrogen Percentage
13%
Phosphorus Percentage
3%
Potassium Percentage
3%
Features
- Patented TruSpike design for easy application
- No cap needed, hammer directly into soil
- Fast-acting yet long-lasting seasonal nutrition
- Rich molasses formula enhances nutrient delivery
- Balanced nutrition for trees and shrubs
- Slow-release for consistent feeding
- Natural nutrient sources
- Made in the USA
What customers say
Consumers overwhelmingly appreciate the exceptional ease of use these fertilizer spikes offer. The application process is simple and mess free, eliminating the hassle associated with granular feeding. Reviewers frequently highlight the convenience of this set and forget system, noting its reliability in delivering consistent, slow release nutrients throughout the growing season. This straightforward approach provides excellent value, simplifying essential tree and shrub care for gardeners of all skill levels.
Know before you buy
Simply hammer the spikes directly into the soil around the drip line of your tree or shrub. The patented TruSpike design allows you to drive them into the ground without needing a cap or pre-drilling holes.
These are slow-release spikes designed to provide consistent nutrition throughout the entire growing season. You typically only need to apply them once per season to keep your plants nourished.
Yes, the balanced 13-3-3 NPK ratio is formulated to support the general health, root strength, and blooming of most established trees and shrubs. They are intended for use on established plants rather than young saplings or newly transplanted stock.
The molasses formula is designed to enhance the delivery of nutrients to the plant. It helps improve the soil environment, making it easier for the roots to absorb the nitrogen, phosphorus, and potassium provided by the spike.
No, these spikes are not organic certified. While they are derived from natural nutrient sources, they contain synthetic components to ensure a balanced 13-3-3 NPK ratio.
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$24