Step 1: Create (or re-create) an edge
The first step is to cut the edge. If you are creating a new bed, you’ll need to use a garden hose to mark your desired lines. If you are freshening up an existing bed, you can jump right in.
Method 1: The traditional way to do this is to use either a spade or a half-moon edger to move along the line you’ve set out. Neither tool does a great job of cutting curves, and it can be difficult to evaluate the course you’re taking as you move along.
Method 2: I use Black & Decker’s Edge Hog, a tool with a circular blade on wheels. I simply walk behind the tool as it rolls easily along, cutting a continuous 11/2-inch-deep line into the soil. The wheels give the tool the mobility to make nice curves, and you can clearly see as you cut, making it easy to evaluate and revise the line of your bed. The edger sells for under $100, and it simplifies the daunting task of caring for my four-acre garden, with its 5,000 linear feet of edging.