Soybeans are tender warm-weather legumes. Sow soybeans in spring 2 to 3 weeks after the average last frost date when the soil has warmed to at least 60°F. Soybeans can be planted earlier in warm-winter regions. Soybeans grow best where the daytime temperature averages in the 70°sF.
Description. The soybean is a bushy, free-branching annual legume. It grows 12 to 36 inches tall. Stems and leaves are hairy. Flowers are white with lavender shading. Pods grow 1 to 4 inches long in clusters of three to five. Each fuzzy pod contains 2 to 4 seeds. There are more than 10,000 soybean cultivars. Colors range from black to gray, brown, green, yellow, white, and striped. Seeds can be smaller than a pea or as large as a kidney bean.
Yield. Grow 4 to 8 soybean plants per each household member.
Site. Plant soybeans in full sun; soybeans will tolerate partial shade but the yield will be reduced. Soybeans grow best in loose, well-drained soil rich in organic matter. Soybeans prefer a soil pH of 6.0 to 6.8. Soybeans are tolerant of poor soil.