Clean and trim the yard thoroughly. This may include cutting the grass, sweeping up the clippings and ensuring that the flower beds and gardens are well tended, mulched and clean. Remove dead leaves, branches and spent flower buds.
Power wash the lawn furniture, patios and stonework that will show in the pictures. The colors should be bright and free of dirt. Ensure that there are no visible cracks or stains in stonework or concrete.
Photograph the yard from various angles and lighting conditions. This will give the editor a good look at the topography of the garden as well as ideas on how it could work in a photospread.
Write a short essay detailing the particulars of the garden, including any interesting stories behind its creation.Talk about interesting architectural features and point to these in the photographs that you enclose.
Mail the pictures and the essay to the magazine you've chosen. If the editor is interested in featuring your garden, she will contact you to set up a professional photoshoot and may also have a writer contact you for additional details about your garden.