Jobe&rsquo;s Tomato Fertilizer Spikes, 6-18-6 Time Release Fertilizer for All Tomato Plants, 18 Spikes per Blister Package Jibe's Tomato Fertilizer Spikes 6-18-6 Fertilizer spikes feed trees at the roots, where they need it most Active Ingredients: Nitrogen, Phosphate, Potash, Calcium, Magnesium, Sulfur This product is made in United States