How do you use evergreen fertilizer spikes?

Jobe’s Evergreen Fertilizer Spikes How to Use: Water well before application. Spikes should be placed along the tree’s dripline. Number of Spikes Needed per Tree: For one to two inches of trunk diameter, use two tree spikes. Number of Spikes Needed per Shrub: use one spike per three feet of height. Click to see full answer. In respect to this, do Fertilizer Spikes really work?Fertilizer spikes are designed to release nutrients slowly into soil — and they do, but sometimes not very effectively. Bacterial and fungal activity, not water, triggers most of the nutrients’ release. Because of the spikes’ design, they release nutrients laterally, which means the nutrients may not reach deep roots.Also, what is the best fertilizer for evergreens? A “complete” fertilizer — one that supplies the macronutrients nitrogen (N), phosphorus (P), and potassium (K) — is often recommended. A fertilizer analysis of 10-8-15 means the fertilizer has 10 percent nitrogen, 8 percent phosphorous, and 15 percent potassium. Secondly, how do you put spikes in fertilizer? Fertilizer spikes should be spaced spaced in a circle around the trunk of a tree or shrub. Install each spike 2 feet from the plant’s trunk or main stem and at least 3 feet from other fertilizer spikes.Can fertilizer spikes kill trees?Don’t be tempted to place the spikes close to the tree trunk. Too much fertilizer can weaken and even kill your trees. Keep the spikes at the drip line. Per tree, spikes are a little more expensive than granular or liquid fertilizer.