Commercially available

• C. 'Haku Ookan'
• Haku
• Haku-ōkan
• Haku Ookan

11 favorite votes.  

Bred by Yoshio Kubota (Japan, circa 1957).
Introduced in United Kingdom by Fisk's Clematis Nursery in 1971 as 'Haku'.

Early Large Flowered.  

Violet.  7 to 8 petals.  Average diameter 7".  Single, curved edge bloom form.  Late spring to early summer, late summer.  

Height: 6' to 8' (185 to 245cm).  

USDA zone 4b through 9b.  Sheltered.  It blooms on the previous year's growth, so resist the urge to prune it in early spring.  

Diploid

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