Today

• Earth Care International youth and the Santa Fe Watershed Association are hosting a tree planting from 9 a.m.-1 p.m. at Agua Fría Elementary School.

• La Montanita Co-op at the Solana Center is hosting an Expo of local nonprofits and businesses with free pizza and smoothies for youth who participate in Turn Off TV Week, 3-7 p.m.

• Students from Kaune Elementary and neighborhood residents of the Hopewell Mann neighborhood volunteer in a workday at the new Hopewell Community Garden, 2:30-6 p.m. at corner of Hopewell and Third Street.

• Green Drinks event with the Santa Fe Alliance with a presentation and book signing by San Francisco eco-entrepreneur Scott Cooney, 6-8 p.m. at Rio Chama Steakhouse, 414 Old Santa Fe Trail. $15 for members, $20 nonmembers. Make a reservation by calling, 989-5362.

• The Native Plant Society of New Mexico-Santa Fe Chapter presents a free talk by Robert Sivinski, New Mexico state botanist on "Southwestern Cienegas — Rare Habitats for Endangered Wetland Plants". 6:30 p.m. REI, 100 Market St.

Friday

• Earth Care International's Youth Allies present an Art and Social Change Show at Warehouse 21, 6-10 p.m.

• Students and community members host a garden celebration and continue work at the new Hopewell Garden, 10 a.m.-3 p.m.

Saturday

• Sixth annual Santa Fe Garden Fair, 10 a.m.-4 p.m., local nursery experts, chefs and others share their tips during free workshops. Loads of garden exhibits and discounted plants. Santa Fe County Fairgrounds, 3229 Rodeo Road.

• Tree planting, celebration and day of service at The Community Farm and San Isidro Park, 1829 San Isidro River Crossing, 10 a.m.-3 p.m., picnic lunch and presentation of the Sustainable Santa Fe Awards at 1 p.m.

• Water and Energy Expo, free workshops and exhibits on water and energy conservation including a two-hour workshop on drip irrigation, 10 a.m.-4 p.m. Hilton Santa Fe Historic Plaza, 100 Sandoval St. For more information on the events, see www.water2conserve.com

Sunday

• Free Water and Energy Expo at the Santa Fe Hilton Hotel downtown, 10 a.m.-4 p.m. At 1 p.m. rainwater harvesting author Brad Lancaster will discuss "Planting Water: What You Can Do Today."