To hang one in your yard, all you need are two sturdy trees spaced about 15 feet apart or two posts driven into the ground and cemented in place. Two tall trees with high boughs are especially suited for this project, as the branches will form a canopy above the hammock, providing comfortable shade on hot days.
Martha's hammock is made of three-ply cotton rope, so it's durable enough to last many years, as long as it is brought indoors during the winter and bad weather. A hammock like this one comes with all the necessary hardware for hanging.