Originated by Heinz Klose of Staudengärtnerei Klose in Germany, this non-registered cultivar is of unidentified parentage.

Croig Wood, Argyll and Bute is a forest in Scotland. This cultivar was included in the article about German hybridizers listed below. A cultivar named H. 'Darke Craig' was listed in The Hostapedia by Mark Zilis (2009).