growing bean pods
  • Crop cultivation

Growing Beans: Crop Success From Planting To Harvest

In a good field and with careful maintenance, growing beans can yield substantial profits. The good field for bean growing is one that receives enough sunlight and has well-drained soil. Careful maintenance means adequate irrigation, sparing fertilizer use, timely (or better, preventive) disease and insect control, and weed elimination. This doesn’t appear to be a huge list of requirements. Plus, you can get assistance with all of this from modern technologies like remote field monitoring and precision farming. With crop popularity on the rise, both existing and new farmers stand to gain from learning the best ways to grow beans.

Types Of Beans To Grow

The common bean is a legume that comes in many varieties. But all of them fall at least into one of three types of crop by use:

  • snap (seeds consumed with pods);
  • shell (seeds consumed while still young);
  • dry (seeds consumed after fully maturing).

Some cultivars are appropriate for all three applications; you’ll just need to choose how long to grow them before harvesting beans.

bean seedlings above and below ground
Depending on their growth habits, there are pole, bush, and half-runner beans. There are certain nuances to growing each type, but overall, it’s similar.

What Conditions Do Beans Need To Grow Well?

Beans, not finicky for growing conditions, yield abundantly throughout the world. But what conditions make growing them the most successful? Let’s examine this question more closely.

Sunlight

The plant requires sunlight for no less than six hours daily. Plants grown in full sun are less likely to suffer from fungal infections. To avoid overshadowing legumes, ensure there are no tall bushes and trees around.

On the other hand, plants can suffer from heat stress if exposed to too much direct sunlight. When these plants, adapted to milder growing conditions, are subjected to heat stress, it drastically reduces their yield and nutritional value.

Where do beans grow?

They are widely cultivated in tropical and subtropical climates and are adaptable to a variety of other climates .

Water

The crop normally demands 1 inch (2.5 cm) of water weekly. Mulching can help keep the soil moist for longer. If the soil is dry at a depth of about 1 inch (2.5 cm), it is time to water. Sufficient watering is particularly important during the flowering stage. To avoid soil-borne diseases, it is best to employ drip irrigation so that soil does not splash onto the foliage.

EOSDA Crop Monitoring can help you manage irrigation more precisely. Use the NDMI index and the Soil moisture feature to determine when and how much to water your plants and schedule irrigation accordingly.

NDMI index map for growing beans
NDMI map generated to assist in irrigation planning.

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Soil

With proper drainage, beans may be grown in almost any soil type, with varying degrees of success. Their ideal soil pH ranges from 6 to 7, which is somewhere in the middle of acidic and neutral.

What soil do beans grow on?

Growing beans is most productive in clay soil or silt loam soil. Slightly acidic loams rich in nutrients will do the best.

Do not grow these legumes at the same site every year to avoid an accumulation of soil-borne infections. So what to grow after beans? Growing onions, tomatoes, squash, or any other heavy feeder will be a good strategy. With the use of the Crop rotation tool on our platform, you can easily design and execute effective crop rotation programs throughout the years.

crop rotation planning in EOSDA Crop Monitoring
Planning crop rotation with the dedicated EOSDA Crop Monitoring feature.

How To Plant Beans

Not planting too early is the golden rule of successful crop production. Seeds planted too early can rot in cool soil. On top of that, seedlings require warmth to grow healthy. So bean planting season usually begins in the spring after the risk of frost has gone.

growing pole beans
To prepare the field for growing pole varieties, set up a series of 6–8 foot (1.8–2.4 m) tall supports, spaced about 3–4 feet (0.9–1.2 m) apart.

For the majority of varieties, it’s best to plant the seeds approximately 1 inch (2.5 cm) deep. Space your rows of bush varieties 2.5–3 feet (0.8–0.9 m) apart, and sow bean seeds 1–2 inches (2.5–5 cm) apart. Once the seedlings have germinated, thin them to 3–4 inches (8–10 cm) apart in the stand.

To ensure uniform crop growth and the highest possible harvest, variable rate planting is the way to go. Segmenting the field and adjusting seeding rates accordingly is made simple with productivity maps in EOSDA Crop Monitoring. These maps, derived from vegetation data from past growing seasons, visualize the productivity of your fields. Pay special attention to areas with lower vegetation, where you may need to raise the seeding rates.

productivity map in EOSDA Crop Monitoring
Productivity map for variable rate planting.

Care And Maintenance Tips For Growing Beans

Growing beans typically does not necessitate any extra maintenance effort. As with any other crop, it’s crucial to effectively combat pests and diseases and prevent weeds from growing to ensure crop success. Also, be sure to use nitrogen sparingly when fertilizing.

Light Fertilizing

Legumes can get by with very little fertilizer because they are not heavy feeders. Applying a small amount of fertilizer to the top 2–3 inches (5–8 cm) of soil either the day before bean planting or right at planting will provide them with nearly all the nutrients they need. Mineral fertilizer in the 5-10-10 NPK ratio, applied at a rate of 3-4 pounds per 100 square feet (14 to 20 kilograms per 100 square meters), will be sufficient for most soils . Another option is to use a comparable amount of organic fertilizer, like aged manure or compost.

In a process known as nitrogen fixation, soil-borne bacteria attached to legume roots draw nitrogen from the soil, which enables plants to supply themselves with the nitrogen they require for flowering and pod production. When fertilizing, keep this in mind: too much nitrogen can make plants grow too much foliage while producing too little yield.

Pest And Disease Control

Different pests attack different crop varieties. Stem nodule poses the greatest threat, especially during wet growing seasons. When bean weevil larvae feed on the root nodules, they inflict severe damage to spring crops. Blackflies are another serious concern, particularly if they establish colonies before the plants bloom.

Although pests in beans vary from one growing season to another, there are ways to make your plants overall healthier and more resistant by using cultural practices. For example, to get rid of insects that overwinter in your fields, till the soil and rotate crops.

Of the many diseases that can infect growing beans, downy mildew is among the most common; it usually strikes spring crops. Fungicides are used to treat the condition. Leaf and pod spot, the most dangerous for winter crops, may be prevented through fungicide seed treatment.

The Disease risk tool on our platform forewarns farmers about potential threats. By being alerted to the possibility of infection in their crops, they can respond quickly enough to prevent or minimize yield losses. Besides, this crop monitoring feature helps insurance companies save money on risk assessment and damage appraisal for extensive farmlands.

assessing disease risk in EOSDA Crop Monitoring
Medium to high disease risk calls for certain action from a farmer.

Eliminating Weeds

Weeds will be less likely to appear in a row if there is a dense crop stand. To further reduce the likelihood of weed development, mulch the soil to a depth of 3–4 inches (8–10 cm). If weeds persist, shallow cultivation done regularly can help get rid of them. Beans grow both taproots going deep into the soil and lateral roots located closer to the soil’s surface, so it’s critical to avoid deep cultivation.

How Long Does It Take For Beans To Grow?

Bush beans grow somewhat faster than pole ones; the former takes 50–55 days till harvest time, while the latter takes 55–65 days. Although various cultivars have varying maturity rates, the typical time to maturity and seed development is under two months. Climate and cultivar determine the exact time to grow, which ranges from 45 to 75 days.

how long does it take to grow a bean

When And How To Harvest Beans

Picking beans takes place in one of three stages, corresponding to the three types of crops by use. Let’s see when to harvest each type of beans:

  • Snap. Pods are delicate, and the seeds haven’t begun to swell.
  • Shelling. The pod has turned a different color, and the seeds have inflated, but they haven’t dried yet.
  • Dry. The seeds within the dried, brittle pods are firm.

It’s best to pick beans before the onset of frost. They are either harvested by swathing or using a combine harvester. With some effort and know-how, growing beans will be a rewarding endeavor for any farmer looking to diversify their crops and reap the benefits of this versatile plant.

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About the author:

Vasyl Cherlinka Scientist at EOS Data Analytics

Vasyl Cherlinka is a Doctor of Biosciences specializing in pedology (soil science), with 30 years of experience in the field. He attended the engineering college in Ukraine and received his degree in agrochemistry, agronomy and soil science in the Chernivtsi National University. Since 2018, Dr. Cherlinka has been advising EOSDA on problems in soil science, agronomy, and agrochemistry.

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