BEST TO START EARLY INDOORS
In spring, 6 weeks before last expected frost, sow seeds 1 inch apart in a container of seed starting mix. Cover lightly, keep warm and moist, and provide a strong light source. Feed every 2 weeks with half-strength fertilizer. Once seedlings are well-established, transplant 2 to 3 inches apart into deeper containers so root systems have room to develop. When 3 to 4 inches tall, acclimate to outdoor conditions and plant in full sun 12 inches apart.
TO START OUTDOORS
Plant in full sun in ordinary garden soil in spring when weather is settled and night temperatures are above 50°F (10°C). Sow seeds in well-worked soil 1/4 inch deep and 4 inches apart. Keep evenly moist while waiting for seedlings to emerge. Thin seedlings 12 inches apart.