OUTDOOR LIVING HOUR! Desert Botanical Gardens And Boyce Thompson Arboretum - The Desert Botanical Gardens in Phoenix is home to thousands of species of cactus, trees and flowers from all around the world spread across 55 acres. Boyce Thompson Arboretum is the oldest and largest botanical garden in Arizona with desert plants and trees from around the world. Jennifer visited both places and discusses what you'll see on your next visit.See omnystudio.com/listener for privacy information.