Beans, beans, the magical fruit.
The more you eat, the more you…well, you know.
What you may not know about this nutritional powerhouse is that it is crazy easy to grow, germinates at lightening speed, adds nitrogen to the soil, and is just plain fun to watch grow.
Beans are the edible seeds of the legume family. Often, but not always, these seeds are kidney-shaped. There are over 40,000 different type of beans found in the world. Some of the more common varieties are:
How's that for a family tree?
How to grow beans
Growing most beans is really simple. Seeds can be planted 1/2 to 4 inches below soil level, watered a little at first, and then only occasionally afterward. Under ideal conditions, some beans can germinate within just 4 days, making them an excellent crop for children. Beans are not very competitive plants, so you can help your bean plants thrive by regularly weeding the area until they are firmly established.
If you have heavy clay soil, be sure you do not overwater. Clay soil can hold so much water that plants will rot or drown. Now, if you want to get really fancy (and better results), you can inoculate the seeds with a species-specific Rhizobium bacteria. This does not mean giving tiny shots to each and every seed (But it’s a funny image, right?) Beans can be dusted with, rolled in, or briefly soaked in the inoculant at planting time to help them get the most nitrogen out of the soil, for a better start. Personally, I’ve never used inoculants, but many gardeners and most farmers swear by them, especially in areas where beans have not been grown for a long time.
Bean growth habits
Generally, bean plants come in one of two growth habits: bush (determinate) or vine/pole (indeterminate). As with other crops, determinate types tend to flower and develop pods within a set time frame, whereas indeterminate types tend to continue on for longer periods of time, producing pods as they grow. Beans prefer plenty of sunlight, but they can be grown in partial shade, as well.
Nitrogen boosting beans
Adding beans to a garden or landscape can help fix atmospheric nitrogen into the soil, making it available to other plants (assuming you cut your beans down and let them decompose before they go to seed. Cowpea roots are pretty tough and deep, so they can also help improve soil structure and reduce compaction. Most beans make an excellent cover crop. Beans are also part of the Three Sisters method of growing used by Native Americans. The Three Sisters Method intercrops corn, squash, and beans to make the most of available growing space, soil nutrients, and water resources. The corn grows tall, the beans climb the corn, and the squash shades the ground and reduces weed competition with wide leaves.
Beans and crop rotation
If you grow beans regularly, it is a good idea to rotate the bean crop with sunflowers, tomatoes, or wheat, to interrupt the life cycle of some fungal pests. Beans are susceptible to damping-off by Pythium, Rhizoctonia, Fusarium, and other pathogens. Thrips and cutworms are common pests. The corn maggot larvae (Delia platura) may gnaw on your planted beans, as well.
Bean seed sources
As tempting as it may be to plant beans that were bought at your local grocery store, this is a bad idea. Those beans can carry diseases that you may never be able to get out of your soil, once they arrive. These diseases are not harmful when eaten by people, but they can be devastating to baby bean plants. Instead, invest in certified bean seed, and then save seed from your crop for next year’s planting!
As a food, beans are high in protein, fiber, iron, potassium, thiamine, vitamin B6, and folic acid, with no cholesterol. Wikipedia has an excellent graphic that shows the protein, finer, and iron content of various beans. [Spoiler alert - lentils and kidney beans top the chart!]
Because beans grow so fast, they can be a fun window sill garden addition.
(And if you want to avoid the undesirable side effects of eating beans, be sure to change the water a few times during soaking and/or cooking. Beano helps, too.)
I hope this information inspires you to grow more of your own food. You can ask your garden questions on my Home page.