Gold
St. John's Wort(Hypericum perforatum)
An improved medicinal cultivar of Hypericum perforatum evaluated in an ex situ common-garden study in Iran, where it outperformed a wild Iranian (Ardabil) population in phenological, morphological, and chemical traits. Its naphthodianthrone (hypericin plus pseudohypericin) content averaged about 0.091% dry weight versus roughly 0.012% in the wild population (about a tenfold difference).
Visual Characteristics
Superior plant height and mean leaf area compared with the wild population, with abundant black glands per leaf and the characteristic yellow, star-shaped St. John's Wort flowers.
Growing Tips
Performs strongly under cultivated common-garden conditions and is a good high-hypericin choice where improved yield over wild stock is desired.
Resistance Information
Disease Resistance
Showed relative tolerance rather than full resistance to Colletotrichum gloeosporioides; plants persisted despite mild infection and produced flowering shoots in both study years.
Where to Buy
Sourcing information coming soon. Check local nurseries and seed banks for availability.