What does anyone know about PLANET. Is it worth the money to become certified? How much does it actually teach you? Is it more beneficial to read books (and this web-site) on landscape design, price estimating, etc. when first starting a business, and then obtain the ceftificates after a few years in the industry. I did a search and not too much came up about them. Also, if anyone in Houston knows where to take landscape contractor/design courses please post reply.