Cryptomeria japonica 'Ryoku Gyoku' / Ryoku Gyoku Japanese cedar
Cryptomeria japonica 'Ryoku Gyoku' is a irregular-globose, extremely slow-growing selection of Japanese cedar with dense, miniature dark-green awl-like foliage that will assume a light-bronzy cast in winter in colder climates. After 10 years of growth, a mature specimen will measure, at best 8 to 10 inches (20 - 25 cm) tall and wide, an annual growth rate averaging less than 1 inch (2.5 cm).
This cultivar originated as a witch's broom found in the late 1990s on a containerized specimen of C. japonica 'Tansu' by Edsal Wood of Aurora, Oregon, USA at his nursery, Bonsai Village. The cultivar names loosely translates into "Jade Ball" in the Japanese language.
Cryptomeria japonica 'Ryoku Gyoku' at the ACS Reference Garden, Oregon Garden, Silverton. A stunning older specimen; clearly one of the first propagated.
Photo by Patrick Breen, Oregon State University
Cryptomeria japonica 'Ryoku Gyoku' — a closeup of foliage detail.
Photo by Patrick Breen, Oregon State University
Cryptomeria japonica 'Ryoku Gyoku' / Ryoku Gyoku Japanese cedar
RECOMMENDED HARDINESS ZONES:
7 (10 to 0 F / -12.2 to -17.8 C)
HORTICULTURAL STATUS: Established
ORIGIN: Witch's Broom
COLOR:
TRINOMIAL TYPE: Cultivar
GROWTH SHAPE: Globe or Globose
GROWTH SIZE: Miniature: less than 1 inch (2.5 cm) per year / less than 12 inches (30 cm) after 10 years
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Explore other Cryptomeria japonica trinomial
-- Select a Trinomial --
Cryptomeria japonica 'Albospica'
Cryptomeria japonica 'Araucarioides' / Snake-branched Japanese cedar
Cryptomeria japonica 'Aurea'
Cryptomeria japonica 'Bandai'
Cryptomeria japonica 'Barabits Gold'
Cryptomeria japonica 'Beaumont's Dwarf' / Beaumont's dwarf Japanese cedar
Cryptomeria japonica 'Benjamin Franklin' / Benjamin Franklin Japanese Cedar
Cryptomeria japonica 'Birodo' / Birodo Japanese cedar
Cryptomeria japonica 'Black Dragon' / black dragon Japanese cedar
Cryptomeria japonica 'Buckiscope' / Buckiscope Japanese cedar
Cryptomeria japonica 'Compressa' / compressed Japanese cedar
Cryptomeria japonica 'Conica'
Cryptomeria japonica 'Cristata' / cristate Japanese cedar
Cryptomeria japonica 'Dacrydiodes' / Dacrydium-like Japanese cedar
Cryptomeria japonica 'Dinger' / Dinger Japanese cedar
Cryptomeria japonica 'Elegans' / elegant Japanese cedar
Cryptomeria japonica 'Elegans Aurea' / Japanese Cedar
Cryptomeria japonica 'Elegans Compacta'
Cryptomeria japonica 'Elegans Nana' / Japanese Cedar
Cryptomeria japonica 'Elegans Variegata'
Cryptomeria japonica 'Elegans Viridis'
Cryptomeria japonica 'Enko Sugi'
Cryptomeria japonica 'Fasciata'
Cryptomeria japonica 'Filifera'
Cryptomeria japonica 'Giokumo' / Giokumo Japanese cedar
Cryptomeria japonica 'Globosa' / Globose Japanese cedar
Cryptomeria japonica 'Globosa Nana' / globose dwarf Japanese cedar
Cryptomeria japonica 'Golden Promise' / Golden Promise Japanese cedar
Cryptomeria japonica 'Gracilis' / Graceful Japanese cedar
Cryptomeria japonica 'Gyokuryu' / Gyokuryu Japanese cedar
Cryptomeria japonica 'Ha-O-Sugi' / Japanese Cedar
Cryptomeria japonica 'Hime-Sugi'
Cryptomeria japonica 'Hino' / Hino Japanese cedar
Cryptomeria japonica 'Honey Moon' / Honey Moon Japanese cedar
Cryptomeria japonica 'Ito-Sugi'
Cryptomeria japonica var. japonica
Cryptomeria japonica 'Jindai' / Jindai Japanese cedar
Cryptomeria japonica 'Kilmacurragh' / Japanese cedar of Kilmacurragh
Cryptomeria japonica 'Knaptonensis' / Japanese cedar of Knapton
Cryptomeria japonica 'Kokuryow'
Cryptomeria japonica 'Koshyi' / Koshy's Japanese cedar
Cryptomeria japonica 'Littleworth Dwarf'
Cryptomeria japonica 'Lobbii'
Cryptomeria japonica 'Lobbii Nana'
Cryptomeria japonica 'Lycopodioides'
Cryptomeria japonica 'Manhishi-Sugi' / Japanese Cedar
Cryptomeria japonica 'Manhismi Sugi'
Cryptomeria japonica 'Mankichi-Sugi'
Cryptomeria japonica 'Monstrosa' / Monstrous Japanese cedar
Cryptomeria japonica 'Mushroom' / Mushroom Japanese cedar
Cryptomeria japonica 'Nana'
Cryptomeria japonica 'Nana Albospica' / White-tipped dwarf Japanese cedar
Cryptomeria japonica 'Ogon-Sugi'
Cryptomeria japonica 'Pom Pom'
Cryptomeria japonica 'Pungens'
Cryptomeria japonica 'Pygmaea' / Japanese Cedar
Cryptomeria japonica 'Pyramidata'
Cryptomeria japonica 'Radicans' / radicans Japanese cedar
Cryptomeria japonica 'Rasen' / Rasen Japanese cedar
Cryptomeria japonica 'Rein's Dense Jade' / Rein's Dense Jade Japanese cedar
Cryptomeria japonica 'Rezek WB'
Cryptomeria japonica 'Sekkan' / Sekkan sugi Japanese cedar
Cryptomeria japonica 'Selaginoides'
Cryptomeria japonica var. sinensis / Chinese cryptomeria
Cryptomeria japonica 'Spiralis' / Spiral Japanese cedar
Cryptomeria japonica 'Spiraliter Falcata'
Cryptomeria japonica 'Taisho Tama'
Cryptomeria japonica 'Tansu' / Tansu Japanese cedar
Cryptomeria japonica 'Tarheel Blue' / Tarheel Blue Japanese cedar
Cryptomeria japonica 'Tenzan' / Tenzan Japanese cedar
Cryptomeria japonica 'Tilford Gold' / Tilford Gold Japanese cedar
Cryptomeria japonica 'Torta'
Cryptomeria japonica 'Twinkle Toes'
Cryptomeria japonica 'Variegata'
Cryptomeria japonica 'Vilmorin Gold' / Vilmorin Gold Japanese cedar
Cryptomeria japonica 'Vilmoriniana' / Vilmorin's Japanese cedar
Cryptomeria japonica 'Viminalis'
Cryptomeria japonica 'sPg-3-005' / Dragon Warrior™ Japanese cedar
Cryptomeria japonica 'Wood's Dwarf'
Cryptomeria japonica 'Yellow Twig' / Yellow Twig Japanese cedar
Cryptomeria japonica 'Yokohama' / Yokohama Japanese cedar
Cryptomeria japonica 'Yoshino' / Yoshino Japanese cedar
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