Boulevard False Cypress, Japanese False Cypress, Sawara False Cypress
Boulevard is a fairly slow-growing conifer, reaching an height of about 3 meters in 19 years. It has soft blue-green foliage and forms a broad, silvery-blue pyramid. Ideal for upright style bonsai.
Informal Upright, Slanting, Broom, Rock-over-root, Clasped-to-rock
Requires Full Sun to partial sun in our climates. Without proper lighting, lower and inner branches brown and die, which is a serious problem because Chamaecyparis will not bud back on old wood. In winter move Chamaecyparis into a unheated greenhouse, away from any chilling wind out door.
The Boulevard love to drink alot of water, but hates soggy soil. So water regularly, prefrebaly in the morning, so that the plant has the water in day time when it needs it most and does not have to stand in water logged soil all night. Soil should remain moist but not wet as it is prone to root rot.
Every two weeks, from early spring to mid autumn. Loves acidic soils so use Miracid. Epsoms salts once a month will keep the foliage looking lush and rich.
Leaf and Branch Pruning:
Cypress need to be constantly pruned to allow light into the deeper reaches of the tree, otherwise die back occurs and no re-growth will occur, which can be a major bonsai headache. Best shaped with the cut and grow approach - with constant pinching of new foliage. Many authors advocate not to use scissors as brown tips can occur were the leafs are cut. I don't seem to have much problem where I am - perhaps because there is high humidity around.
Re-potting & Growing Medium:
Younger Boulevards roots grow very fast and should be re-potted every 2-3 years, older ones repot every 4-6 years. You can remove as much as a third of the roots mass. Use a well draining mix, 1 part sharp sand, 1 part grit (6-10 mm), 1 part loam. The loam will keep the potting medium from completely drying out, while the sand and grit will allow for good draining and air circulation essential to fight root rot. Conversely you can use Akadama on its own.
While the preferred method of shaping a cypress is pruning and pinching, wiring can be carried out most any time of the year, but branches take a while to set. To avoid wire scars it is best to repeat wiring a few times leaving the wire on for no more then 3-4 months at a time. Allow at least as long between wiring. Best to avoid wiring during the high growth seasons.