Enriching depleted soil can help maintain the quality of your garden. Enrich depleted soil with help from a certified nursery professional in this free video clip. Expert: Mark Govan Bio: Mark Govan founded ABC Pest Control, Inc. in 1985 in Largo Florida. Govan is a Certified Arborist with the International Society of Arboriculture and a Certified Nursery Professional. Filmmaker: Christopher Rokosz Series Description: Preparation, maintenance and care are three keys to planting a successful garden. Get home gardening tips with help from a certified nursery professional in this free video series.