Those who pay a $10 membership fee to join the National Arbor Day Foundation during March will receive 10 Colorado blue spruce trees.

The trees are part of the non-profit foundation's Trees for America campaign.The trees will be shipped postpaid for planting before May 31 with enclosed planting instructions. The 6-to-12-inch trees are guaranteed to grow or they will be replaced free of charge.

To join the foundation, send a $10 membership contribution to Ten Blue Spruces, National Arbor Day Foundation, 100 Arbor Ave., Nebraska City, NE 68410. Membership requests must be received by March 31.