NAME: St. John's Wort OTHER COMMON NAMES: SCIENTIFIC NAME: Hypericum Perforatum. COLOR: Bright yellow flower PLANT SEEDS: HARVEST: Throughout summer/autumn. PLANT HEIGHT: up to 2-3 ft. ZONE: 2-10 LIGHT REQUIREMENTS: Full Sun to partial shady SOIL & WATER PREFERENCES: Average QUANTITY: 1,000 Seeds OTHER: Seeds can be surface sown outdoors or started in pots indoors. Use a rich, well-draining soil. Spray the surface of your soil to keep it moist. Then flatten it out without applying much pressure. Sow the seeds on the surface, and cover with clear plastic to seal in moisture. Keep at around 60 degrees Fahrenheit in good light. The seeds can take as long as 90 days to germinate. Keep your plants at a final spacing of about 1.5 feet apart in full sun to partial shade.