Russian arborvitae and Siberian cypress  (Microbiota decussata) is an underutilize ground cover (USDA hardiness zones 3-7). This tough juniper-like evergreen hails from Siberia and demonstrates exceptional cold hardiness to -40 ° F. In extreme northerly sites, the lacy evergreen foliage may turn complete brown in the dead of winter and re-sprout in spring.

In the cool temps of zones 5 and 6 microbiota really prospers. It struggles (melts down) in zone 7 unless cozied up under afternoon shade. Its soft feathery green foliage develops a purple to russet cast where winters are abnormally harsh. An early spring warm-up quickly restores its cool medium green hue.

Growth rate is slow to medium. Feed, if needed, in early spring with a general purpose granular fertilizer such as 10-10-10 or equivalent. Pruning is rarely necessary except to check its spread or to remove any broken branches.

The flat sprays of low growing microbiota range between 8-15 inches in height and 6-8 feet in width over several years. Microbiota is a great alternative to some disease plagued ground cover junipers. It is tolerant of dry shade. Deer and most disease and insect pests don’t bother it. It wants good soil drainage and cool summer temperatures.

Adjacent to my driveway I use microbiota to cascade over a low retaining wall. Foliage tolerates windy exposed sites once it becomes fully established in 2 years.

I am seeing more independent garden centers selling this terrific ground cover. E-commerce specialty nurseries also sell it. Plant container grown nursery stock in late winter thru spring.

Varieties: Celtic Pride™ – an exceptional cold hardy form.