Rhapis excelsa var. ‘Koban’
 
Common Names Koban Lady Palm, Puffy Leaf Rhapis
 
Zones 9–11
 
A rare and highly prized Japanese cultivar of Rhapis excelsa, ‘Koban’ is distinguished by its compact stature, ornamental “puffed” leaf blades, and slow, clumping growth. Selected for its wide, short, and downward-curving leaf segments, this palm offers a refined architectural presence in shaded gardens and interiors. Historically cultivated for elite collectors, ‘Koban’ remains one of the most sought-after dwarf Rhapis forms.
 
Key Features
Growth Habit: Clumping; rhizomatous; extremely slow-growing
Height: 2–4 ft (0.6–1.2 m); mature height rarely exceeds 8 ft (2.4 m)
Trunk: Slender; ~1 in (2.5 cm) diameter; covered in coarse brown fiber; bamboo-like when exposed
Leaves: Palmate; wide, short, stiff segments with a “puffed” appearance; edges curve downward; deep green with subtle gloss
Inflorescence: Rare; small yellow flowers in panicles; fruit uncommon
Ecology: Cultivar of Rhapis excelsa selected in Japan; thrives in shaded, humid environments
 
Growing Conditions
Light: Bright indirect light to deep shade; avoid direct sun
Watering: Moderate; allow top inch of soil to dry between waterings
Soil: Well-drained potting mix; slightly acidic to neutral
Temperature: 60–80°F (16–27°C); cold hardy to 20°F (–6°C)
Humidity: Moderate to high; misting recommended indoors
Propagation: By rhizome division; extremely slow to establish
Tolerance: Excellent for low light and indoor conditions; drought tolerant once established
 
Landscape Use Ideal for bonsai-style containers, interiorscapes, shaded patios, and collectors of rare Japanese cultivars. Pairs well with Rhapis excelsa ‘Super Dwarf’, Licuala triphylla, and Aspidistra elatior.