Most gardeners apply a two inch layer of mulch in their gardens. Applying a thinner layer of mulch can actually encourage weed growth. The mulch should be spread evenly and should not apply mulch directly over an area that has just been seeded since mulch can prevent seeds from germinating or suffocate newly germinated seeds. In addition the mulch should be kept 2-3 inches away from vegetables, the trunks of trees, and the base of perennials and shrubs. This will prevent decay caused by wet mulch and insect infestations.
Anne Lenox Barlow is a professional horticulturist who enjoys gardening with her family in Plattsburgh. She also chronicles her gardening experiences at her blog www.northcountrygarden.wordpress.com. She can be reached at firstname.lastname@example.org.