Cupressus arizonica 'SULPHUREA'

Cupressus arizonica
Cupressus arizonica 'SULPHUREA'
smooth cypress
SIZE/TYPE taller shrub
USUAL HEIGHT 3-5m
USUAL WIDTH 1-2m
LEAVES evergreen conifer
COLOUR OF LEAVES +multicoloured:yellow a green
FLOWERS insignificant or non-blooming
COLOUR OF FLOWERS
BLOOMING TIME
LOCATION full sun
USDA zone (lowest) 6b   (down to -21°C)
WINTER PROTECTION  
FOR ZONE 5+6 Code of winter protection zone 5+6
FOR ZONE 7 Code of winter protection zone 7
BELONGS TO CATEGORIES Conifers
Hedging plants

Smooth cypress comes from SW of the USA and is probably the only true cypress that can survive winters of zone 6. Sulphurea is a French variety from 1963. As the name suggests, it has light yellow colour of new growths that turn pale yellow or light sulphur yellow in summer. The foliage forms typically thin, thread-like branches which are always erect when emerging, and are covered with small, pointed, scale-like leaves (needles). The dorsal glands produce tiny resin flecks that release very fragrant scent without having to touch them. Mature foliage is blue-green.

Sulphurea smooth cypress has dense, upright growth into a widely columnar or narrowly pyramidal shape. It grows moderately and can be pruned, trimmed, or sheared into any shape you like from mid spring until late summer. Just avoid cutting into old wood. Medium hard pruning deserves a dose of slow-release fertilizer.

Smooth cypress will grow in any well-drained soil in full sun, sheltered from cold, drying winds. Its tested hardiness is -22°C (USDA zone 6b), and it is supposed to withstand short spells of a few degrees lower. Though, a protected location is suggested to be found for it in zone 6, sheltered from drying winds and all-day sun in winter.

Last update 25-01-2013
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GLOSSARY
  • STANDARD QUALITY - Plants of this group are 1st class quality with number of branches and overall density adequate to their size and age, considering they were container grown.
  • DE LUXE QUALITY - This label guarantees a luxurious quality of manually selected plants that, compared to their height and age, are exceptionally dense and beautiful.
  • EXTRA - These plants are usually mature and bigger specimens with exceptional overall appearance.
  • STANDARD (as described in the plant form) means a tree with a trunk of 190-210 cm and a crown at the top, unless specified differently. The commercial size for trees is their girth measured in the height of 1m from ground.
  • HOBBY - These plants are of the same quality as our standard-quality plants but younger and therefore cheaper.
  • SHRUB - a woody plant with branches growing bushy from the ground level.
  • HALF-STANDARD or MINI-STANDARD - a small tree with shorter trunk, its size is usually specified.
  • FEATHERED - These are trees with branches growing already from the base of the trunk and up along the stem.
  • GRASSES and PERENNIALS - Sizes given usually read the diameter of the pot or the clump, as specified.
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