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Ryokogu Coyokyu Japanese Cedar

Cryptomeria japonica 'Ryokogu Coyokyu'

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Ryokogu Coyokyu Japanese Cedar (Cryptomeria japonica 'Ryokogu Coyokyu') at A Very Successful Garden Center

Ryokogu Coyokyu Japanese Cedar foliage

Ryokogu Coyokyu Japanese Cedar foliage

(Photo courtesy of NetPS Plant Finder)

Height:  12 inches

Spread:  24 inches

Sunlight:  full sun  partial shade 

Hardiness Zone:  5b

Description:

A mounded miniature variety that is very dense with a fine texture; bright green foliage takes on red coloring in late fall and winter; very slow growing, excellent for accenting in a rock garden or borders

Ornamental Features

Ryokogu Coyokyu Japanese Cedar is a dwarf conifer which is primarily valued in the garden for its interestingly mounded form. It has attractive light green evergreen foliage. The tiny needles are highly ornamental and turn antique red in the fall, which persists throughout the winter.

Landscape Attributes

Ryokogu Coyokyu Japanese Cedar is a dense multi-stemmed evergreen shrub with a mounded form. It lends an extremely fine and delicate texture to the landscape composition which should be used to full effect.

This is a relatively low maintenance shrub, and should not require much pruning, except when necessary, such as to remove dieback. It has no significant negative characteristics.

Ryokogu Coyokyu Japanese Cedar is recommended for the following landscape applications;

  • Mass Planting
  • Rock/Alpine Gardens
  • General Garden Use
  • Container Planting

Planting & Growing

Ryokogu Coyokyu Japanese Cedar will grow to be about 12 inches tall at maturity, with a spread of 24 inches. It tends to fill out right to the ground and therefore doesn't necessarily require facer plants in front. It grows at a slow rate, and under ideal conditions can be expected to live for 40 years or more.

This shrub does best in full sun to partial shade. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It is particular about its soil conditions, with a strong preference for rich, acidic soils, and is able to handle environmental salt. It is quite intolerant of urban pollution, therefore inner city or urban streetside plantings are best avoided, and will benefit from being planted in a relatively sheltered location. Consider applying a thick mulch around the root zone in winter to protect it in exposed locations or colder microclimates. This is a selected variety of a species not originally from North America.

Ryokogu Coyokyu Japanese Cedar makes a fine choice for the outdoor landscape, but it is also well-suited for use in outdoor pots and containers. It is often used as a 'filler' in the 'spiller-thriller-filler' container combination, providing a canvas of foliage against which the thriller plants stand out. Note that when grown in a container, it may not perform exactly as indicated on the tag - this is to be expected. Also note that when growing plants in outdoor containers and baskets, they may require more frequent waterings than they would in the yard or garden.

 
 
Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Characteristics
Massing  Rock  Garden  Container 
Applications
Foliage Color  Texture  Plant Form  Winter Value 
Ornamental Features