I used this to finish my garden before spring planting. It was the easiest. It loosens the soil and makes digging holes easier. Just attach it to your cordless drill and you're good to go.
Pros
β One size: 1.8" (4.6cm) diameter x 14" (37cm) long, 3/8" steel shaft with non-slip hex drive. Work with any 3/8 inch or larger electrical or wireless device. drill. Makes large planting jobs much easier and faster. *Drill not included*