University of Nevada Cooperative Extension and their Certified Master Gardeners offer free gardening classes in February and March. “Gardening in Nevada: The Bartley Ranch Series” is for anyone who wants to garden – those with big yards, small yards, or just patio or balcony space. The classes, offered in partnership with Washoe County Regional Parks and Open Space, run 6 - 8 p.m., every Tuesday, at Bartley Ranch Regional Park, 6000 Bartley Ranch Road in Reno. “Northern Nevada has an ever-changing, unpredictable climate,” Cooperative Extension Horticulturalist and Master Gardener Coordinator Wendy Hanson Mazet said. “Learning to grow plants successfully here can be a challenge.