0.5 to 1 in.
12 to 18 in.
USDA zones 4-8
hardy to 8,500 ft.
Woolly thyme is a low-growing plant with tiny fuzzy, grey-green leaves. In late spring, it is covered by small pinkish-purple flowers. Never growing taller than 1 inch, it is a great plant for rock gardens or in between flagstone steps.
Woolly thyme has produced variable results at the Xeriscape Demonstration Garden. It grows well in protected locations, especially those that have persistent snow cover during the winter. However, in open, dry sites it often dies back over the winter. It seems to grow best at higher elevations or with regular winter watering.
Winter watering will help prevent dieback in areas with no persistent snow cover.