It’s no secret that beautiful, healthy trees make your yard look spectacular Jobe’s fertilizer spikes for trees and shrubs ensure a continuous supply of nutrients below the surface, where the trees active roots are growing Jobe’s spikes are easy to insert around each tree’s dripline and the slowrelease formula lasts all season No wasteful runoff, no mess, hazards or smells only a safe beautiful yard For best results, use Jobe’s fertilizer spikes for trees and shrubs in early spring and late fall