This article was co-authored by Rob Litman and by wikiHow staff writer, Sophia Latorre. Rob Litman is a Landscaper, General Contractor, and the CEO of Vitoli Inc., a landscaping, hardscaping, ecoscaping, and swimming pool design company in Los Angeles, California. With over 20 years of experience in construction, Rob specializes in energy-efficient and drought-tolerant landscaping. He holds Genera