Opening day at the Sylvan Ranch Community Garden including garden tour and plant sale. 8 a.m.-2 p.m. 7450 Stock Ranch Road, Citrus Heights. (916) 384-6215.
"Ione: A View from the Castle," American Association of University Women home tour. 11 a.m.-4 p.m. Main Street, Ione. $25; tickets can be purchased at Preston Castle. (209) 245-6052.
Open garden, sale of historic roses, and silent auction to benefit the rose garden at Sacramento Historic City Cemetery. 9:30 a.m.-2 p.m., 10th and Broadway, Sacramento. Free. (916) 264-7839.
Sixth annual Earth Day open house, with master gardeners, Sonoma Birding and Beekeeping Association, Pine Cone Project, and more. 10 a.m.-3 p.m. Quarryhill Botanical Garden, 12841 Sonoma Highway, Glen Ellen. Free. (707) 996-3166.
Loomis Earth Day event will offer water-saving workshop, meetings with local farmers and growers, Star EcoStation's exotic reptiles, and more. Noon-4 p.m. most activities (8 a.m.-4 p.m. yard sale). Loomis Train Depot, 5775 Horseshoe Bar Road, Loomis. (916) 652-8606.
Elk Grove Community Garden annual plant sale. 9 a.m.-1 p.m. 10025 Hampton Oak Drive, Elk Grove. (916) 893-8863.
Antique Evaluation Day to benefit Welcome Home Housing, mental health housing, with appraisers Gary Cox, Sylvia Fitzgerald and more. 11 a.m.-3 p.m. Arden area at Unitarian Universalist Society, 2524 Sierra Blvd., Sacramento. $8 one item, $35 five items. (530) 666-0202.
Today and Sunday
Sacramento Orchid Society Show and Plant Sale. 10 a.m.-5 p.m. Saturday, 10 a.m.-4 p.m. Sunday. Scottish Rite Masonic Center, 6151 H St., Sacramento. $6 general, children free, free parking. (916) 489-3263.
Curtis Park's 26th annual home and garden tour. 10 a.m.-4 p.m. The two-mile tour starts at the north end of Curtis Park, near Broadway. $15-$25. (916) 452-3005.
Spring plant sale hosted by master gardeners. 8 a.m.-3 p.m. Veterans Memorial Building parking lot, 130 Placerville Drive, Placerville. (530) 621-5502.
Next Saturday and April 29
The 27th annual Spring Home and Garden Show with Paul Costa of DIY and HGTV's "Turf Wars" and "Yard Crashers." 10 a.m.-5 p.m. Saturday, 10 a.m.-4 p.m. Sunday. Nevada County Fairgrounds, 11228 McCourtney Road, Grass Valley. Free, $5 parking. (530) 273-9561.
The 12th annual garden tour, "Gardens of Folsom," with master gardeners, plant and bake sales, and artists painting in the gardens. 11 a.m.-4 p.m. Garden No. 1, 141 Grey Canyon Drive, Folsom. $12. (916) 984-3851.
Classes and workshops
Planning Your Kitchen Remodel seminar. 10-11:30 a.m. DreamBuilders Home Remodeling Showroom, 893 Embarcadero Drive, Suite 103, El Dorado Hills. Free. (916) 933-7371.
Starting a Vegetable Garden, Part 2, presented by master gardeners. 9-11 a.m. Senior Garden, 11477 East Ave., Dewitt Center, Auburn. Free. (530) 885-7385.
Trees and shrubs workshop presented by El Dorado County master gardeners. 9 a.m.-noon. Veterans Memorial Building, 130 Placerville Drive, Placerville. Free. (530) 621-5502.
Composting and vermiculture workshop presented by Placer County master gardeners. 10 a.m.-3 p.m. Roseville Utility Exploraton Center, 1501 Pleasant Grove Blvd., Roseville. Free. (530) 889-7385.
Learn how to support pollinators and enhance the environmental potential of your home landscape in the workshop at "Your Sustainable Backyard: Pollinator Gardening." 8:30 a.m.-4 p.m. Room 1001, Giedt Hall, UC Davis. $45. (530) 752-6642.
"Lasagna" gardening technique and plant exchange. 10 a.m.-noon. Ruth Bancroft Garden, 1552 Bancroft Road, Walnut Creek. $20 general, $12 members. (925) 944-9352.
Grow vegetables and learn new techniques for increasing production with the workshop "Organic vegetable gardening beyond the basics." 10 a.m.-noon. The Roseville Utility Exploration Center, 1501 Pleasant Grove Blvd., Roseville. $10 general, $7 Roseville residents. (916) 746-1550.
Better understand the features of your irrigation controller during the workshop "Irrigation Controller Basics." 1-2:30 p.m. The Roseville Utility Exploration Center, 1501 Pleasant Grove Blvd., Roseville. $8 general, $6 Roseville residents. (916) 746-1550.
Roseville Green Thumb Garden Club meeting with Lidia Rebel, florist and arranger, speaking on "Longer Vase Life." 6:30 p.m. Raley's Event Center, Douglas and Rocky Ridge, Roseville. (916) 723-2508.