Woolly Yarrow
(Achillea tomentosa)
 
Evergreen with silvery green, mat-like growth.  Five-inch-long leaves.  Six to 12 inches tall.  Yellow blossoms spring to fall.
 
Zone: 2-10
Light: sun
 
Comments
Useful in sandy or rocky areas.  Hardy cover plant.  Space plants 6 to 12 inches apart in spring.  Can be mowed to maintain uniform height.