• Free Orchid Growing Class - Learn how to grow orchids in Colorado's environment, 11 a.m. today, Fantasy Orchids, 830 W. Cherry St., Louisville. 303-666-5432

• Free day at the Denver Botanic Gardens - 9 a.m. to 5 p.m. Monday, 1005 York St. 720-865-3500

• Lecture - "Botanical Discovery in the Age of Exploration: How Linnaeus Shaped the World's View of Plants," presented by Annika Silander- Hokerberg and James Reveal, 7 p.m. Tuesday, Denver Botanic Gardens Mitchell Hall, 1005 York St. Registration, 720-865-3580. Preregistration, $16 members, $21 nonmembers. Day of lecture, $25.

• Slow the Flow: Choosing, Adjusting and Maintaining Your Sprinkler System - With Brent Meecham, 7 to 9 p.m. Feb. 28, Denver Botanic Gardens, 1005 York St. 720-865-3580. $10 to $15

• Home Improvement Classes for Women - Workshop offers hands-on classes in basic home- improvement skills, Tuesdays through Thursdays, 47 W. Alameda Ave. For classes, times and details, call 303-284-6354. Cost is $50 to $150 depending on content

• Governor's Residence tours - School groups are invited to visit the Governor's Residence, 10 a.m. to 2 p.m. May 1, 8 or 15. Reservations, 303-866-3682

• Denver 2007 Master Composter Training and Outreach Program - Receive 40 hours of instruction in backyard composting, compost science, compost-bin construction, vermicomposting (composting with worms), integrated solid-waste management, recycling, community outreach and more. Classes are held once a week for 10 weeks. 303-292-9900

Send calendar items to Elaine Goodman, Rocky Mountain News, 101 W. Colfax Ave., Suite 500, Denver, CO 80202; fax 303-954- 5407; or e-mail spotlight@RockyMountainNews.com.