Tree & Shrub Fertilizer Spikes (72 Spikes - 18.0 Lbs) - Easy Root

In this review of SimplyGro Tree & Shrub Fertilizer Spikes the bottom line is straightforward: these pre-measured 5-in spikes are for gardeners who want a low-effort, targeted way to feed trees and shrubs without liquid mess or guesswork. The biggest reason to buy is the convenience of a set-it-and-forget-it nutrient delivery that feeds at the roots for up to three months, making seasonal care simple for mixed landscapes of flowering, fruiting, deciduous and coniferous plants.

Key Features

• Balanced 8-8-8 Formula: Provides equal amounts of nitrogen, phosphorus and potassium to support vigorous growth, flowering and root strength across many species.
• Pre-measured Spikes: Each 5-in TruSpike delivers a controlled dose so users are less likely to over-feed and can apply consistently around multiple plants.
• Continuous Feeding: Designed to release nutrition at the roots for up to three months, reducing the need for frequent applications during the growing season.
• Durable TruSpikes: Patented spike design resists breaking, crushing and smashing for straightforward installation with a hammer or mallet.
• Made in the USA: Manufactured domestically to maintain consistent quality and performance across the 72-spike package.

Who It's For

These fertilizer spikes are best for homeowners and landscapers responsible for mixed plantings where simplicity and predictability matter. If you maintain decorative shrubs, small fruit trees or a collection of evergreen and deciduous specimens, the spikes let you feed multiple plants quickly without measuring powders or mixing liquids.

People who should look elsewhere include gardeners who need fast foliar feeding or customized N-P-K ratios for specialty crops, and those managing very large trees where deep root feeding solutions or professional soil tests may be more appropriate.

Pros & Cons

Pros

• Pre-measured TruSpikes reduce the risk of over-application and make seasonal care quicker.
• Balanced 8-8-8 formula supports growth, flowering and root development for a wide range of trees and shrubs.
• Durable construction ensures the spikes will not crush or break during installation.
• Long-lasting feeding action up to three months cuts down on repeat applications.

Cons

• Continuous root feeding is slower to affect visible leaf color than foliar sprays, so results can be gradual.
• Fixed N-P-K ratio means less flexibility for plants that require a different nutrient balance.

Specifications

Brand	SimplyGro
Package Quantity	72 spikes (18.0 lbs)
Spike Length	5 in
N-P-K	8-8-8
Feeding Duration	Up to 3 months per spike
Recommended Timing	Apply in spring and fall
Country of Manufacture	United States

Our Verdict

SimplyGro Tree & Shrub Fertilizer Spikes are a practical, cost-effective option for gardeners who want reliable root feeding without fuss. The durable TruSpikes and balanced 8-8-8 formula make them good value for mixed landscapes where convenience and consistent nutrition matter more than tailored nutrient programs. Buy them if you want easy twice-a-year maintenance for trees and shrubs; consult other fertilizer types if you need immediate foliar effects or specialized formulations.

Frequently Asked Questions

How often should I apply these spikes?
Apply once in spring and once in fall for best results, as each spike feeds up to three months.

Will the spikes work for both fruiting and ornamental trees?
Yes; the balanced 8-8-8 formula is intended for deciduous, coniferous, flowering and fruiting trees and shrubs.

Are the spikes easy to install?
Yes; TruSpikes are designed to be hammered in without breaking and require no special caps or equipment.