Researched by NASA investigators in the 1990s as one of the crops to sustain long-term space exploration, every stage of the cowpea is edible. Their seeds are extremely high in protein and their leaves and immature pods, also nutritious, are quite tasty.
Cowpeas are strongly tap-rooted, as opposed to the shallow lateral root systems of common beans. This means cowpeas are more tolerant of water stress and less than ideal soils. Interestingly, if irrigation is used, cowpeas tend to focus more on vegetative growth which results in delayed maturity.
Soils benefit from cowpea cultivation. Like most legumes, the roots of cowpeas become home to soil bacteria that transform atmospheric nitrogen into the usable forms of nitrogen required by plants. Cowpeas are known for relatively high rates of nitrogen-fixation, in a sense providing not only their own fertilizer but nutrition for neighboring plants.
The cultivation of cowpeas is comparable with the growing of common beans. Like beans, they can have a climbing, bush, or bush with runner growth habit. We sow cowpea seeds 1-1.5 inches (~2.5-4 cm) deep at an in-row spacing of 4-6 inches (~10-15 cm.) Because we grow multiple varieties of cowpeas per season, their plots are intermingled amongst our other crops. For bush varieties, we use a between-row spacing of 9 inches (~23 cm) to match our favorite cultivation tool, the Terrateck. Climbers are trellised.
Cowpea seeds germinate best when the soil temperature reaches a consistent 65°F / 18°C. Under cooler conditions, germination is very slow increasing the chance seeds rot before emergence. We use a simple probe meat thermometer to monitor soil temperature in the spring.
Cowpeas are a viable option for high-quality animal fodder.
Saving your cowpea seeds to create your own true-to-type seed stock is a straightforward process. Cowpea blossoms self pollinate. Simply allow pods to mature and dry on the vine and collect their seeds. However, Mother Nature has made cowpea blossoms appealing to insects which increases the chance of cross-pollination between varieties. To harvest seeds for your own seed stock, isolate your cowpea varieties by a distance of at least 100 ft (~30 m.) If you intend to share or sell your seeds, an increased distance of 656 ft (~200 m) is recommended.
Recipes coming soon...