Check out this information on well-drained soil.
St. John’s Wort Care Must-Knows
Plant St. John’s wort in spring or early summer. Blanket soil around plants with a 2-inch-thick layer of mulch and water plants regularly during the first growing season to encourage an extensive root system. Reduce watering during the second growing season. In some climates, the tips of St. John’s wort branches die back in winter. Simply shear the plants back to live wood in spring and this hardy perennial will regrow. St. John’s wort blooms on new growth so winter dieback is not a problem. Prune plants as needed in early spring and they will produce a large crop of flowers in summer. Every three or four years, consider renewal pruning St. John’s wort. Renewal pruning involves shearing the plant back to half its height in spring. Renewal pruning encourages dense, vibrant new growth and helps the plant retain a pleasing, rounded form.
