Denver Botanic Gardens, Chatfield
July 22-Sept. 24: In partnership with the Butterfly Pavilion, Denver Botanic Gardens presents hundreds of native butterflies among native plant species, including monarchs and painted ladies. 9 a.m.-3:15 p.m. $4 ($2 per member). Chatfield Farms; 8500 W. Deer Creek Canyon Road, Littleton; 720-865-3500; botanicgardens.org
Ekar Urban Farm
July 23: People of all ages can help plant, tend and harvest more than 100 varieties of organic vegetables, 9 a.m. to noon, free (tools provided, bring water, a hat and sunscreen); kids can join the “Future Farmers’ Program,” which offers family farm projects and fun activities, 10 a.m., free (ages 4-10).