To celebrate Arbor Day, the City of Columbia Heights will sell trees to residents at discounted rates. Supply is limited -- only 85 trees are available, so it's first-come, first served. Choices range from Blue Beech to Zestar apples. Orders must be pre-paid, checks preferred. The order deadline is April 15. To see prices and the full list of available trees, visit www.columbiaheightsmn.gov/trees.