Jobe's Organics Slow Release Tree & Shrub Fertilizer Spikes — 160 Count Bulk, 15-3-3 Acid-Loving Formula

Jobe's Organics Slow Release Tree and Shrub Fertilizer Spikes provide a simple, mess-free way to feed acid-loving trees and shrubs all season with a measured 15-3-3 formula.

These pre-measured spikes are designed to deliver nutrients directly where roots are actively growing, eliminating runoff, spills, and guesswork. Each bulk pack contains 160 spikes formulated to be used twice yearly — once in early spring and once in late fall — keeping trees and shrubs supported through the growing season. The slow-release design steadily supplies nutrients beneath the soil surface, reducing the chance of over-application and making routine maintenance quick and reliable.

How do these spikes feed my trees and shrubs?

The spikes dissolve gradually after insertion, releasing a steady supply of nutrients into the soil around active root zones. Because nutrients are delivered underground, the spikes minimize surface loss and focus feeding where plants need it most.

• 15-3-3 NPK ratio tailored for many acid-loving species.
• Pre-measured spikes prevent accidental over-fertilizing.
• Slow-release formula spreads nutrient delivery over months.

When and where should I apply the spikes?

Apply spikes twice a year: once in early spring as roots resume active growth, and again in late fall before dormancy. Place the spikes around the tree or shrub's dripline where feeder roots are concentrated for best uptake.

• Insert around dripline evenly spaced for consistent feeding.
• Use early spring and late fall for seasonal coverage.
• Works in beds, borders, and around specimen trees.

Will these spikes create mess or runoff in my yard?

The solid spike format avoids loose granules and liquid runoff; nutrients are released beneath the soil, so there’s minimal mess and no stinging smells. This makes them convenient for family yards, high-traffic landscapes, and areas near walkways or patios.

• No loose product to spread by wind or water.
• Reduces the risk of surface runoff compared with liquids or powders.
• Easy, clean application without specialized equipment.

Which trees and shrubs benefit from this 15-3-3 formula?

This formula is suited for many acid-loving ornamentals and landscape trees that prefer steady, low-to-moderate nitrogen feeds. It’s commonly used for species like oaks, maples, dogwoods, boxwoods, and other shrubs that appreciate acidic soil conditions.

• Recommended for acid-preferring trees and shrubs.
• Bulk 160-count pack supplies multiple plants or repeat seasonal applications.
• Available in other formulas if different nutrient balances are needed.

Who is this for: Jobe's Organics Slow Release Tree and Shrub Fertilizer Spikes are best for homeowners, landscapers, and gardeners who want a low-effort, tidy feeding solution for acid-loving trees and ornamental shrubs. If you need a predictable, pre-measured fertilizer option that reduces mess and targets root zones directly, this bulk pack provides enough spikes for regular seasonal maintenance across multiple plants.

Ingredients

N-P-K