Cryptomeria japonica 'Koshyi'
Koshyi is a very unusual dwarf variety of Cryptomeria ( Japanese Cedar ) that is perfectly suited for small sized landscapes, rock gardens, and also great for container / patio gardening as well. Forms a nice dense mass of super green foliage as it matures, with its green color held well throughout the winter months. Absolutely no trimming / maintenance needed at all to maintain Koshyi in a nice neat shape - does not get out of hand!!
Regular feedings, and high organic content to the soil is recommended......especially when used in container gardening on a permanent basis. This is a really cool little plant that is easy to care for, doesn't get very big, and has many uses in space restricted landscapes.
Plant Facts & Specifications
--Mature Height: up to 10 inches
--Mature Width:18 - 24 inches
--Growth Rate: Slow ( 2" - 3" avg per yr )
--Hardiness Zones: 5 - 9
--Sun Exposure: Full sun to partial shade
--Soil Preference: Average to slightly moist & fertile, acidic - well drained. Mulching recommended.
--Foliage Color & Texture: Nice bright medium green needlelike foliage is fairly soft when new, becoming more stiff & dense as it matures. Green color is held year round - little, if any, winter discoloration.
--Flower, Cone, Or Berry Facts: None to mention - although occasionally small rounded cones have been noted on mature specimens
--Diseases / Insects: Two types of Fungi - Pestalotia sp. and Phyllosticta sp. - have been occasionally discovered on browned off branches in several areas of the Southeast. Hard to say for sure if these fungi were the cause of the browning, or appeared after branch dieback had occurred. No other major pest / disease problems have been reported.
--Fertilization / Feeding: For maximum health & hardiness, we highly recommend a good grade granular ( preferably organic ) fertilizer / plant food for use with all of our plant species. We personally use, and recommend the Espoma line of organic plant foods, as they are super effective yet gentle enough to use on even the most delicate of evergreen species where fertilizer burn would normally be a major concern. However, a water soluble type plant food (Miracle Gro, or equivalent ) are also acceptable options. Other granular fertilizers with a 6 - 12 - 12, or 10 - 10 - 10 ratio can also be used - but we suggest using them at 1/2 - 3/4 strength to avoid any chemical burn issues to the root system of the plants. Best to fertilize in early spring, and again in mid fall - avoid feeding standard chemical fertilizers during hot summer months, and directly after transplanting. The Espoma Organic Plant Foods may be used at anytime.