Ten shade trees are offered to those who join National Arbor Day Foundation this month, the group said.
The species include red oak, sugar maple, weeping willow, green ash, thornless pin oak, and red maple. They are six to 12 inches tall, shipped postpaid with planting instructions, and replaced if they die.
Memberships are available by sending $10 to the foundation at 100 Arbor Ave., Nebraska City, NE 68410 by April 30. The group's Web site is www.arborday.org.