You often don't think of fertilizing your landscape since trees and grass are just part of the background, however, they can benefit greatly from some extra attention. The right fertilizer can help your lawn remain lush and green all season long by promoting strong root growth and increasing the ability of the established grass to absorb nutrients from the soil. The same is true with trees. Typically the fertilizer spike is the best way to feed your tree since it will deliver a steady, consistent stream of nutrition until winter arrives and it's ready to go into dormancy for winter.