SimplyGro Fertilizer Spikes for Citrus, Fruit Trees & Shrubs — 12-Pack (3.0 lb) 8-4-8 Root-Feed, 3-Month Release

SimplyGro Fertilizer Spikes are pre-measured, 5-inch TruSpikes delivering an 8-4-8 feed directly to the roots of citrus, fruit, nut and berry trees and shrubs for up to three months per spike.

These ready-to-use fertilizer spikes simplify tree and shrub feeding by placing balanced nutrients where plants uptake them most: the root zone. Each pack includes twelve durable TruSpikes (totaling 3.0 lbs) formulated with 8% nitrogen, 4% phosphorus and 8% potassium. Designed for seasonal use, the spikes are easiest to install in spring and fall to support leaf growth, bloom development and energy storage without measuring, mixing or spreading loose granules.

How do SimplyGro spikes help my citrus and fruit trees perform?

They provide a steady release of primary macronutrients that trees and shrubs use for leaf production, root development and fruit quality. Because the nutrients are concentrated at the roots, plants receive efficient feeding with minimal surface runoff or waste.

• 8-4-8 N-P-K targets balanced growth and fruit development.
• Continuous feeding for up to three months after insertion.
• Root-zone placement reduces nutrient loss to surrounding soil.
• Twice-yearly use supports spring growth and fall energy storage.

How easy is the application—do I need tools or mixing?

Application is straightforward: use a hammer or mallet to drive each 5-inch TruSpike into the soil near the drip line. No measuring, liquids, or spreaders are required, and the spikes are engineered not to crumble so cleanup is minimal.

• Insert 5-inch spikes into the root zone—no mixing or measuring.
• TruSpikes resist breaking, crushing, or smashing during installation.
• Use once in spring and again in fall for best seasonal results.
• Simple set-and-forget feeding minimizes maintenance time.

When should I use the spikes and how often?

Best practice is to apply the spikes twice a year: once in early spring as plants resume active growth, and again in autumn to help trees store reserves for winter. Each spike releases nutrients over roughly three months, so timing aligns feeding with the plants’ natural cycles.

• Spring application for leaf, flower and shoot growth.
• Fall application supports carbohydrate storage and winter readiness.
• One spike feeds for up to three months—plan applications seasonally.
• Follow label spacing guidelines by tree size for even feeding.

Are these spikes safe for my landscape and the environment?

Placing nutrients directly into the root zone lowers the chance of surface runoff and helps reduce nutrient loss compared with broadcast feeding. Pre-measured spikes also reduce the risk of over-fertilization that can stress plants or harm nearby waterways.

• Root-focused delivery reduces nutrient runoff risk.
• Pre-measured dosage lowers likelihood of overfeeding.
• Durable formulation prevents crumbling or dust during use.
• Manufactured in the USA to consistent quality standards.

Who is this for: SimplyGro Fertilizer Spikes suit home gardeners, orchard hobbyists, and landscapers who prefer a low-effort, reliable feeding method for citrus, fruit, nut and berry trees and ornamental shrubs. If you want a tidy, seasonal way to supply balanced N-P-K to mature plants without liquid fertilizers or spreading granules, these TruSpikes offer a durable, convenient option.

Ingredients

Corn Gluten Meal, Urea, Muriate of Potash, Superphosphoric Acid, Potassium Phosphate.