Fertilize and forget it! One application will feed those trees up to 12 months!
High quality, slow release micronutrient supplements in easy to use spikes! Spikes contain sulphur which aids in the uptake of all macro- and micronutrients.
Stakes have specially designed caps so they are easily inserted into soft soil with a small mallet to the feeder roots for more nutrient uptake and less waste. Sold as a big box of 40 stakes or 10 stakes. One application lasts up to 12 months!
- Box of 40 spikes
- 8-10-10 formula, with 3.2% manganese, 4.8% sulfur and 3.3% iron
- Place one spike for every 1 inch of trunk diameter in a circle around the tree dripline

- This product is covered under A.M. Leonard’s exclusive 30-Day Down to Earth Guarantee. Click Here for more Details.
- Up to 12 months of slow release fertilizing
The General Purpose Tree Spike is an easy to use, slow-release fertilizer spike designed to provide trees with high-quality nutrients for a period of up to 12 months.
What is the formula of the General Purpose Tree Spike?
The formula for the General Purpose Tree Spike is 8 10 10, with 3.2% manganese, 4.8% sulfur, and 3.3% iron, plus micros.
How many spikes are included in a box of General Purpose Tree Spikes?
A box of General Purpose Tree Spikes includes 40 spikes.
How do I use the General Purpose Tree Spike?
Place one spike for every 1 inch of trunk diameter in a circle around the tree’s dripline. The specially designed caps make it easy to insert the spikes into soft soil with a small mallet.










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