SimplyGro Tree & Shrub Fertilizer Spikes 12-Count (3.0 lb) — 8-8-8 Slow-Release TruSpikes, 3-Month Feed

SimplyGro Tree & Shrub Fertilizer Spikes are pre-measured 5-inch TruSpikes delivering balanced 8-8-8 nutrition to feed trees and shrubs for up to three months per application.

These ready-to-use spikes simplify fertilizing by supplying nitrogen, phosphorus and potassium directly at the root zone. Packaged as a 12-spike set (total 3.0 lbs), the TruSpike design resists breaking and eliminates messy granular spreading. Use them in spring and fall on deciduous, coniferous, flowering and fruiting plants to support leaf development, blooms and root strength without special tools or measuring.

How do these spikes deliver nutrients to trees and shrubs?

The spikes dissolve slowly after installation, releasing nutrients into the soil where roots absorb them. Because the product feeds at the root zone, nutrient uptake is efficient and targeted, reducing waste compared with surface-applied granules.

• Balanced 8-8-8 N-P-K formula for general tree and shrub needs
• Slow-release action feeding for up to three months per spike
• Placed below the surface to reach feeder roots directly

When should I apply SimplyGro fertilizer spikes?

Apply spikes twice yearly for best results: once in spring when plants break dormancy and grow vigorously, and again in fall to help roots store energy. For newly planted specimens, follow label guidance and avoid over-application until the root system is established.

• Spring application for leaf and bloom production
• Fall application to support root energy storage
• Each spike feeds one plant for about 3 months

How many spikes do I need and where should I place them?

Use one or more spikes depending on trunk diameter and plant size—larger trees may need several placed evenly around the drip line. Drive each 5-inch spike into the soil at a slight outward angle until secure, keeping them away from direct contact with the trunk to avoid concentrated nutrient exposure.

• Small shrubs: one spike each
• Medium to large shrubs and small trees: two to four spikes spaced around the root zone
• Large trees: increase spikes proportionally and space around the drip line

Are these spikes easy to use and environmentally mindful?

Yes—SimplyGro TruSpikes are rigid and non-crumbling, so they install cleanly without caps or special tools; just hammer in and leave them to work. Because the nutrition is pre-measured and placed in the soil, there's less runoff risk than with loose granular fertilizers, helping protect nearby water and plants.

• Patented TruSpike design that won’t break or crumble
• Pre-measured doses reduce risk of over-feeding
• Less surface runoff and nutrient loss compared with loose products

Who is this for: Gardeners, landscapers and homeowners who want a low-effort, reliable feeding option for a variety of trees and shrubs will benefit from SimplyGro Tree & Shrub Fertilizer Spikes. They suit busy yards with mixed plantings, municipal or residential landscapes where clean application and consistent nutrition matter. Made in the USA, these spikes are an easy choice when you prefer targeted root feeding without measuring or frequent reapplication.

Ingredients

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