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General Purpose Tree Spikes, 8-10-10 Plus Micros, Box of 40 Spikes by A.M. Leonard

5
1 Reviews Write Review
Out of stock

Estimated in stock on Feb 13, 2026

SKU
ULS40
$90.85
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pro-plusSave up to $0.74
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NOTE:  This item is currently experiencing delivery delays. We recommend the following substitute product:

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!
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Reviews from the field
"I have been using these in my large home garden for several years now. I am very satisfied with the health and condition of the trees after using these spikes. I will buy them again." [Click to see all reviews]

Product Information

Product Specs
  • 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
Product Warranty Information

  • This product is covered under A.M. Leonard's exclusive 30-Day Down to Earth Guarantee. Click Here for more Details.
Product Features
  • Up to 12 months of slow release fertilizing
Product Shipping Weight
  • 13 pounds
Frequently Asked Questions
What is the General Purpose Tree Spike?
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.

Additional Product Information
MSDS
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