Ross® Bulk Outdoor Tree Stakes ensure a continuous supply of nutrients at the plant"s root, where it"s needed most. Ross Bulk Stakes are easy to insert around the tree"s dripline and the slow release formula lasts all season. The premeasured spikes make fertilizing easy with no measuring, hazardous chemicals or smells. Bulk fertilizer stakes come loose in a carton and are availible in three formulas -Evergreen, Fruit and Tree & Shrub.