Does the very thought of trying to grow anything in the caliche of the Las Vegas Valley send you screaming from the room? Have you thought about improving your own gardening skills? If you have ever needed help for a difficult spot in your garden or with a plant here in Las Vegas, there is a good chance that someone suggested you call the Master Gardeners. If you have ever admired the native plants outside the visitor center at Red Rock canyon, or the arboretum on the UNLV campus, then you have already been impressed by the work of the Master Gardeners.