How to Fertilize perforate St John's wort?
Balanced perennial feed every four weeks from spring through summer

perforate St John's wort · Hypericum perforatum
Also known as: cammock; common St John's wort; devil chaser; devil's flight; devil's scourge; God's wonder plant; herb John; human blood; Klamath weed; penny John; rosin rose; St Columba's flower
Grows well in moist but well-drained soil. Ideal for wildflower garden or in mixed border
Balanced perennial feed every four weeks from spring through summer