Joshua's Native Plants Got crabgrass out back? Critters in your chrysanthemums? Then get your homegrowns some professional help at Joshua's in the Heights. The specialists at this nursery can tell you how to ward off molds and pests, but they also let you wander the aisles without pushing anything on you. If you're already a pro, delight in some of Houston's most hard-to-find and exotic varieties of vegetation: sweetly scented almond verbena, string bean-like stalks of sophora, thick dark blue-and-green Gold Dust ground cover and starfish cactus (a swampy-climate succulent that looks like the desert plant). There are also tall grasses, bamboo, evergreens, multiple varieties of hibiscus, jasmine and ivy. Your greens will be the envy of the neighborhood.