Port Orford cedar 'Green Pillar'

Try to plant in a location that enjoys full sun and remember to water moderately. Green Pillar is generally regarded as a hardy plant, so this plant will survive close to or on freezing temperatures. Green Pillar needs a soil ph of 4.8 to 7.5 (moderately acidic soil - weakly alkaline soil).

Green Pillar is hardy, so ensure you wait until all danger of frost has passed in your area before considering planting outside.

It was first discovered (by Euro-Americans) near Port Orford in Oregon and introduced into cultivation in 1854, by collectors working for the Lawson & Son nursery in Edinburgh, Scotland, after whom it was named as Lawson Cypress by the describing botanist Andrew Murray². The USDA officially calls it by the name Port Orford cedar, as do most people in its native area, but some botanists prefer to use the name Lawson cypress (or in very rare instances Port Orford cypress) instead. The name “Lawson’s cypress” is widely used in horticulture². This tree has many botanical synonyms, but the current officially-accepted name is Chamaecyparis lawsoniana^{1 2}.

¹ The Plant List

² Chamaecyparis lawsoniana on Wikipedia

³ Green Pillar on the Conifer Society website