Top Point forms a narrow conical spire 4 to 5 feet tall and only 18 to 24 inches wide, with soft juvenile foliage that turns rich plum-purple in cold weather. Chamaecyparis thyoides Top Point is a selection of Atlantic white cedar, growing in full sun, hardy from Zone 4 through Zone 8.
The winter color change is the reason to grow it. Green through the growing season, then shifting to purple as temperatures drop and holding that until spring.
Atlantic white cedar grows wild in coastal swamps and bogs from Maine to Mississippi, which makes it unusual among conifers: it tolerates wet ground and even standing water where most evergreens rot.
The narrow habit suits a tight bed, a pair flanking a door, or a vertical accent in a small garden. It wants acidic soil and consistent moisture rather than the sharp drainage junipers need. Deer leave it alone.