You can sow from seed or direct seed. Beans are easily injured and killed by frost, so delay planting until all danger of frost is past. Seeds will sprout in 8-16 days depending on soil temperature. In optimum conditions at least 85% of seeds will germinate. Usual seed life: 3 years. 56g = 2 ounces. Optimum soil temperature for germination: 21-32ºC (70-90ºF).