St. John's Wort

A mixture of herbaceous and woody perennials, Hypericum, contains only a few species with landscape significance. They are mostly valued for their bright yellow flowers that have a long bloom period.

Hypericum androsaemom  
H. buckfryi  
H. calycinum St John's Wort
H. olympicum  
H. patulum  
H. polyphyllum  
   

Species Hgt
(in)		 Flower
diameter (in)		 Use Flower
Wood
H. buckfryi  9-12 ¾-1½ Small shrub Old
H. calycinum 15-18 2½-3 groundcover Old
H. olympicum  9-12 1½-2 groundcover New
H. patulum 18-36 1½-2 Medium shrub New
H. polyphyllum  6-12 1½-2 Small shrub New
         

* Guides and Keys are from the book "Herbaceous Perennial Plants A Treatise on their Identification, Culture and Garden Attributes" by Dr Allan M. Armitage of the University of Georgia. Varsity Press, Athens, Georgia. 1989 ISBN 0-942375-00. More on Dr Armitage and his other books.

 
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