Epimedium x perralchicum 'Frohnleiten'
21st April 2006
A German clone of the hybrid raised by Heinz Klose. Narrow yellow petals, very vigorous and floriferous.
6th April 2008
14th April 2009
28th April 2012
Barker, David G. - Epimedium and other herbaceous Berberidaceae, Hardy Plant Society, 1997
Stearn, William T. - Epimedium, 2002.