Chamaecyparis lawsoniana 'IVONNE' ('Yvonne') Lawson cypress
size/type
taller shrub,taller shrub
usual height
3-6m
leaves
evergreen conifer
colour of leaves
flowers
insignificant or non-blooming
location
full to partial sun
USDA zone (lowest)
5 (down to -29°C)
winter protection
for zone 5+6
for zone 7
categorized
Lawson cypress is native to northwestern America, from Oregon to northern California. It was first discovered by European Americans near Port Orford, Oregon, and was introduced to horticultural market in 1854. It was described by the Scottish botanist Andrew Murray (1812-1878) and named after another Scottish botanist and merchant, Charles Lawson (1795-1873), who became famous by importing new plant species from America to Britain. This cypress tree was one of his discoveries. It is a hardy, evergreen conifer with soft, scale-like needles. Perhaps all over the world in temperate climates, it is widely planted in gardens and parks and is popular for its variability. There are many colourful varieties that brighten up compositions of dark green shrubs and trees and perform also in decorative outdoor containers.
Description of the plant:
Ivonne (or sometimes spelled Yvonne) is a Lawson cypress variety with almost flat, soft needles of bright greeny-yellow colour from spring to summer, changing to golden-yellow in winter. It grows medium fast into a columnar shape when young, slightly wider at the base with age. It is very hardy, but still we recommend planting coloured varieties in sheltered locations if you live in mountainous regions so that the cypress is protected from the worst winds. All plants will survive but might look unsightly in the spring. It is tolerant of all types of pruning. It prefers moist, slightly acidic soil but is adaptable to almost all types of soil. Fully hardy to approx. -29°C (USDA zone 5).
Last update 10-01-2008; 20-01-2010
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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.
