Growers of High Altitude Lavender. Red Rock Ranch and Farms LLC, located in Concho, Arizona, grows several different varieties including Provence, Grosso, Royal Velvet, Buena Vista, Vera, and Munstead. In addition to the plants in the ground, the lavender farm has lavender plants in the greenhouse for sale to people who need plants that are acclimated to grow in similar type climates and altitudes. The lavender is harvested by hand each summer.