Official Suttons Seeds Seller. Average Packet Content 3000 seeds Traditionally used as a topical antiseptic and anti-inflammatory wound healer. Recently known for its medicinal use in treating depression Steep its flowers in sunflower oil for a healing balm Well known in recent times for its medicinal use in the treatment of depression, this versatile plant has more traditionally been used as a topical antiseptic and anti-inflammatory wound healer. You can use it as an oil or turn it into a soothing balm. Easily grown and adding a splash of yellow to summer borders, St John's Wort produces a profusion of flowers which, when harvested, bruised and left to steep in sunflower oil on a sunny windowsill, magically turns the oil from yellow to bright red by which time it is ready to do its stuff next time you get into a scrape! Flowers late May-June. Height 70-80cm (27-31"); spread 40-50cm (16-20"). In some studies, St. John's wort has been shown to interact with certain commonly used medications (e.g. warfarin). If you are taking other medications, please check with your doctor. Do not take St. John's wort if already taking other anti-depressants. (Check with your doctor.) Growing Information: Sow directly into weed-free, well prepared, weed-free soil and lightly cover with soil (Germination up to 21 days). Keep seedlings moist and thin to around 45cm spacings; thinned seedlings can be planted elsewhere if desired. Alternatively, seeds can be started in trays in a cool greenhouse and planted out after the last frost has passed.