Summer Foliage of Microbiota Microbiota (Microbiota decussata) goes by numerous names including Russian arborvitae and Siberian cypress. This tough customer hails from Siberia, and quite cold hardy to -40 F. In the northern U.S. its lacy evergreen foliage turns brown in the dead of winter. Here in the Southern Appalachian region, microbiota prospers in cooler parts of zone 6 […]