All 50 U.S. states will be competing for trees this summer when Odwalla launches its third annual Plant a Tree program. The program is a partnership between Odwalla and America’s State Parks to support the environment and help with important reforestation and planting initiatives.

Visitors to www.odwalla.com/plantatree can click on one of 50 state park systems where they would like to plant a tree, free of charge. Odwalla will double last year’s donation — which went to the 11 participating states — and plant 200,000 trees through the 2010 program. Tree locations will be determined by website visitor designation.

In addition to the Odwalla website, a portion of the trees will be allocated via codes found in the Park Visitor Welcome Kits at participating State Parks. Fans of Odwalla on Facebook also can create their own virtual Microforest by encouraging others to donate trees via the Plant a Tree program. Fans will get virtual credit when their friends participate in the Plant a Tree program — helping to spread the word about the program. As more friends designate tree donations from Odwalla, the fan will get a virtual forest planted in their name.

The website portion of the Odwalla Plant a Tree program runs from May 25, 2010 through August 15, 2010. Codes found in the State Park Visitor Welcome Kits can be redeemed through December 31, 2010. The species of trees donated will vary by region and will be planted in fall 2010 and early 2011. Odwalla has donated 160,000 trees since the program began in 2008.