SPINACH - Spinacia oleracea. If it’s vitamins and minerals you’re after, no vegetable has them in greater concentration than spinach. Give it a rich humus soil and plenty of moisture for a bounteous crop of health-giving “greens”. Plant spinach outdoors in early spring when soil temperature reaches 60°. Water light but regular. When hot weather approaches or there is more than 14 hours of light, spinach will bolt. Plant again 60 to 70 days before first frost in fall. Approximately 2500 seeds per ounce or 85 to 90 seeds per gram.