- Iron Chlorosis Tree Fertilizer Spikes, 125 Pack -Fertilizer Sticks & Plant Food Spikes for Oak, Maple, Birch & Pine Trees - Contains 4.8% Sulfur, Iron, Nitrogen, Phosphate, Potassium

These are a great solution for providing much-needed iron to your trees and shrubs over a long period of time. I pound these into the ground around my deciduous and evergreen trees every spring to help keep them dark green.

These turned our trees back beautiful we will always use these

These spikes are very durable and very well packaged. The box is heavy cardboard with a divider to keep the spikes from moving during shipment. Looking forward to how th is work next spring.

Helped with chlorosis, but did not clear up the problem.

Impressive. We will see if they work. Went into ground easily!

Idk how well they will feed my tree, so I will update my review at the end of summer but this is a review of the install. Packed well, none broken. Install was a pain. Even after a few weeks of rain the spikes broke at the mid point. The caps broke after 1 or 2 uses. I found out if you just use a shovel to poke a hole in the ground, you can add the spike. Let's see what happens. Update: The grass died in the spots I planted the spikes, expected with a large dose in one spot. I used this product to darken my tree leaves because they looked so pale. I didnt see any difference, but perhaps the product doesn't target greening up leaves but have healthier roots, Im no expert. I gambled with the product without doing any research if the tree i was targeting actually benefited from the ingredients. So do your own research before buying.