Why You Should Be Fertilizing Trees and Shrubs

Improve the health and disease tolerance of your trees and shrubs each year by supplementing much-needed nutrients every fall using fertilizer spikes or a root feeder. Shrubs and trees require energy stores to survive the winter and maintain healthy vigor to defend against pests and diseases. Trees can be fertilized in early fall and spring.

How to Measure a Tree for Fertilizing

Using Tree Fertilizer Spikes is Idiot Proof 

Bring your tree measurements with you and our sales staff can help you determine how many spikes or tablets required for your tree. Measure your tree trunk diameter about 18 inches from the base to get the most accurate measurement. Shrubs and multi-stem trees without a main trunk, just estimate their height. Tree spikes are available in three different formulas for shade, ornamental and evergreen trees and shrubs. 

How to Use Tree Fertilizer Spikes

Fertilizer spikes are combinations of slow release fertilizers compressed to form a spike. Spikes can be driven into the ground using a mallet or hammer. A bulb auger and electric drill make installation much easier. Tree spikes should be dispersed evenly along the outer drip line of the tree. For small trees and shrubs requiring only one or two spikes, break spikes in half to allow for a more uniform distribution pattern.

Uncle’s Tip: Do not use fertilizer spikes on newly installed trees or shrubs. Spikes contain fertilizers in amounts not recommended for new trees or shrubs. For newly planted trees, use Uncle’s Root Accelerator for the first 12 months. 

See Related: Fertilizing New Trees and Shrubs

Tree Fertilizer Spikes
How to Use Tree Fertilizer Spikes
Drill Holes for Tree Fertilizer Spikes
How to Install Tree Fertilizer Spikes with an Auger

What Is a Root Feeder? 

Root feeders connect directly to your garden hose. Special water soluble tablets are inserted into the root feeder handle. The attached hollow metal probe is pushed deep into the soil. As water flows through the root feeder, fertilizer tablets dissolve quickly, and nutrients become readily available to the roots. These root feeders can be used for deep watering trees during drought periods.

See Related: Correcting Iron Chlorosis

How to Use a Root Feeder

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