• Everything You Need To Know About Lawns - Learn how to prepare soil, sow seed and establish a healthy lawn, 9:30 to 11 a.m. today, Echter's Garden Center, 9170 W. 52nd Ave. 303-424-7979. Free

• Colorado Cactus and Succulent Society Show and Sale - 9 a.m. to 5 p.m. today, 9 a.m. to 4 p.m. Sunday, Denver Botanic Gardens, 1005 York St. 720-865-3500.

• Native and Underused Perennials for Our Climate - 1 to 2 p.m. Sunday, Tagawa Garden Center & Florist, 7711 S. Parker Road, Aurora. 303-690-4722, ext. 101. Free

• Gardens as Sanctuary - Holly Shimizu, director of the U.S. Botanic Gardens at the National Arboretum, speaks on how to make your garden a sanctuary, 7 p.m. Thursday, Denver Botanic Gardens, 1005 York St. 720-865-3580. $16 members, $21 nonmembers, $25 day of event

• Wet-Water Gardening Fun in 2007 - Learn from representatives of garden centers about products to enhance your water features and ways to help your ponds, fish and plants respond to our recent cold, snowy winter, 7 to 9 p.m. April 11, Gates Hall, Denver Botanic Gardens, 1005 York St. 303-843-9619.

• Laid-Back Gardening - Learn how to grow an attractive, low-maintenance garden with native and adapted flowers and shrubs, 10 a.m. April 14, Paulino Gardens, 6280 Broadway. Registration, 303-429-8062. Free

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.