After the seedling is planted and the soil has been backfilled, place the slow-release fertilizer packet 1 to 2 inches from the seedling root, roughly 2-inches deep.
Use only 1 packet per seedling.
After the containerized tree is planted and the soil has been backfilled, place the slow-release fertilizer packet 3 to 4 inches from the tree root, at a depth of roughly 3 to 4 inches.