Jobe's Organics Fertilizer Spikes

Unlike liquid fertilizers that wash away easily with rain or irrigation, these spikes are inserted directly into the soil. This slow-release method delivers nutrients consistently to the root zone over time, reducing waste and the need for frequent reapplication.

While specifically formulated for evergreens like junipers, spruces, and magnolias, they can be used on other ornamental trees. However, always check the specific nutrient needs of your plant species, as the 13-3-4 NPK ratio is tailored to support the specific growth cycles of evergreens.

For optimal results, apply these spikes in the early spring and again in the fall. These periods align with the natural growth cycles of evergreens, ensuring they have the necessary nutrients as they wake up from dormancy or prepare for winter.

You should drive the spikes into the ground at the tree's drip line—the area directly under the outer circumference of the tree's branches. They should be buried at least two inches below the soil surface to ensure the nutrients reach the root system effectively.

Because these are slow-release spikes, they are designed to break down gradually and release nutrients at a steady, safe rate. When applied according to the package instructions, they pose a very low risk of fertilizer burn compared to quick-release granular fertilizers.