Tree & Shrub Fertilizer Spikes (Box of 24) - Easy, Long-Lasting Feed

In this review the Old Farmer's Almanac Tree & Shrub Fertilizer Spikes are judged primarily on ease of use and plant response. The bottom line: these spikes are for gardeners who want a low-effort, measured way to feed established trees and shrubs without liquid mixes or granular spreading. The product stands out because the premeasured spikes deliver fertilizer directly to the root zone, making application simple and reducing guesswork for seasonal feeding.

Key Features

• Premeasured spikes: Each spike contains a set nutrient dose so users apply consistent feeding without measuring or mixing.
• Direct root delivery: The spike form places nutrients close to roots for efficient uptake and visible growth improvement over time.
• Durable construction: The spikes are sturdy enough to be staked into soil and resist breaking during normal placement.
• Long-lasting feed: Designed to provide a sustained nutrient release that supports trees and shrubs between seasonal applications.
• Box quantity: A pack of 24 spikes supplies multiple trees or repeated treatments for a small landscape or garden beds.

Who It's For

These fertilizer spikes suit homeowners, casual gardeners, and property managers who prefer a tidy, low-mess method to feed ornamental trees and shrubs. If someone wants a precise, one-time seasonal treatment that avoids broadcast spreading or mixing liquids, these spikes fit that workflow.

Those with very compact soil or plants in heavy clay that resist penetration should consider other application methods, since a few customers noted mixed results when trying to pound spikes into dense ground. Also, the spikes are intended for established trees and shrubs rather than seedlings or container plants requiring diluted feeds.

Pros & Cons

Pros

• Easy to use and reduces measuring or mixing for straightforward seasonal feeding.
• Customers report noticeable growth rate improvements when used as directed.
• Spikes are durable and generally do not break during normal insertion.

Cons

• Some users found soil permeability and compacted ground can make insertion difficult, so a mallet or pre-drilled hole may be needed.

Specifications

Our Verdict

The Old Farmer's Almanac spikes are a practical choice for gardeners who value simplicity and consistent feeding. They offer good value for property owners who need seasonal, low-effort nutrient delivery to established trees and shrubs, though users with compacted soil should be prepared to ease insertion before placement.

Frequently Asked Questions

How many spikes per tree?
Follow the product guidance for trunk diameter; typical use is multiple spikes around the dripline for small to medium trees.

Can they be used on container plants?
These spikes are formulated for in-ground trees and shrubs; containers and seedlings usually need diluted, gentler feeds.

Are they easy to insert?
Most users find them easy to use, but very compact or rocky soil may require pre-drilling or a mallet for insertion.