Before you begin doing any digging, plowing or planting, sketch out the size you want your haxagon-shaped flower bed with the flowers situated where you want them. This will give you a visual aide of what you will be doing once you get ready to actually dig and shape the ground.
Use a measuring tape to mark each place where the hexagon comes to a sharp point (as shown in the graph). Start out with a small hexagon so that you can get a proper visual. For example, if you want your hexagon shape to be 60 inches from each sharp point, start out making each point only 24 inches apart. This will help you see more carefully if your hexagon is shaped properly.
Place sticks or markers where each point is. Wrap string around each marker, then string it to the next marker, until you have an enclosed hexagon shape.
Measure from each point straight back to the size that you want your finished flower bed to be. So if you have already measured each point 24 inches apart, then you only need to measure another 36 inches to make your total 60-inch hexagon.
Post your new points with the markers and then restring the markers. Your area is now marked out and ready to be plowed. If you still have grass in the area where you are building the flower bed, you will need to either remove the grass by hand with a shovel or rent a sod cutter.
Using the markers, cut along the string edges to shape your hexagon. Once the area is grass free and plowed, plant your flowers and shrubs how you want them to appear.
-Kelly Nuttall, ehow Editor