Garden docents will be present to explain the many uses of cactus and agave at the Garden’s Cactus & Agave Discovery Station. Discover how these plants have evolved to survive and thrive the harsh desert climate. Twilight Tuesday is the UC Botanical Garden summer after-hours. Take a stroll, bring a picnic dinner, enjoy the magic of the Garden at dusk! Free for Garden members, Half-off for non-members. No entry after 7 pm. Garden shop open until 7 pm.