A hybrid between Chamaecyparis nootkatensis and Cupressus macrocarpa, this conifer grows very fast—from cuttings to 15—20 ft. high in 5 years. It is most often planted as a quick screen. In gardens, it usually reaches 60—70 ft. tall by 8—15 ft. wide and can be pruned into a tall (10—15 ft.) hedge but will quickly get away from you without regular maintenance. Long, slender, upright branches with flattened gray-green foliage sprays give youthful trees a narrow, pyramidal form, though they can become open and floppy. It produces small cones composed of scales.
—Naylor—s Blue— has grayish blue foliage; —Castlewellan— has golden new growth and narrow, erect habit; —Golconda— has a more refined, formal pyramidal habit with bright lemon yellow new growth; —Gold Rider— also has golden new growth and eventually forms a pyramid 35 ft. high by 15 ft. wide; and —Emerald Isle— has bright green foliage on a plant 20—25 ft. tall, 6—8 ft. wide.
Will accept a wide variety of soils and climate conditions. It also takes strong wind. To maintain as a hedge, shear several times during the growing season, making sure not to cut into old wood. In warm-summer regions, loses stiff, upright habit and is subject to coryneum canker fungus, reaching only 30—40 ft. tall before dying from the disease.
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