St. John’s wort can be propagated by seed, root division, layering, or stem cuttings

Seed propagation

  1. Collect the berries or capsules in the fall. 
  2. Let the capsules dry at room temperature for a few weeks. 
  3. Break open the berries to release the seeds. 
  4. Store the seeds in a cool, dry, dark place. 
  5. In spring, sow the seeds in a sandy soil mixture. 
  6. Keep the soil moist and in a warm place with bright, indirect light. 
  7. After the seedlings have a couple of pairs of leaves, thin or transplant them. 

Stem cutting propagation 

  1. Select a 4–6 inch stem from a healthy part of the plant.
  2. Cut the stem just above a leaf bud.
  3. Remove the leaves from the lower half of the stem.
  4. Dip the cut end in rooting hormone.
  5. Place the cutting in a container with damp potting soil.
  6. Keep the soil moist.
  7. Place the container in a warm area with bright, indirect light.
  8. Once the cutting has rooted, transplant it to a new container or outside.

St. John’s wort is easy to grow and can tolerate a wide range of conditions.