Soybeans benefit a garden in a multitude of ways. Not only is soybean adaptable to different types of soil (although the best quality of soil is ideal), it is a hardy plant and produces a healthy bountiful harvest within a couple months. When planting these green vegetables, it is important to prepare the soil properly and to pick your planting times carefully according to your climate and region.
Plant soybeans in early May in most regions. This will vary, as the soil needs to be at a temperature of 55 to 60 degrees F. Soil that is warm encourages germination for optimum health. Choose a planting site in full sun.
Till the soil to a depth of 5 inches and discard any rocks, dirt clods, broken roots, weeds, grass or other debris. Mix in the best quality organic soil you possibly can--choose one that's well-draining, loamy and loose. Don't plant soybeans in hard packed clay soil unless you amend it with materials like sand to improve drainage and peat moss to improve nutrient intake. Soybeans need loose soil to get air circulation to roots, and increase water retention.
Plant soy bean seeds about 1.5 inches into the soil with your fingers or a small trowel. The depth may depend on the variety. For example, plant larger soybean seeds about 2 inches deep. Sprinkle soil over the seeds to lightly cover them. Space plants 10 inches apart and keep rows about 2 feet apart.
Water immediately after planting so that the water reaches about 2 inches deep. Continue to water every two days until germination, which happens in after seven to 10 days.
Continue to water deeply about twice a week, depending on your environment and climate. Keep the soybean seedlings moist.