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Fertilizing Beans: When, How & Which Fertilizer To Use

Beans derive from the multiple genera of the flower plant family. It’s a high source of manganese, protein, vitamins, and many more. To control your appetite, the starches and fiber contained inside make you feel full.

Sure thing feeding the beans during the season will provide more fruits with delicious taste. Chemical fertilizers include nitrogen, phosphorus, and potassium, which are the three most significant nutrients that beans need.

For better growth, you need to balance the pH level with a bit of acidic soil obviously. I always say check the soil acidity beforehand and then act accordingly. Watering, mulching, and sun exposure are other things to be careful about besides fertilization.

When to Fertilize Beans?

As you know, beans in general aren’t that hungry kind of plants, they are good once a month throughout the growing season. When it’s established, you can decrease the fertilization which ideal is for once every 2-3 months. 

Nearly all beans prefer Spring fertilization when it’s planted outdoors and this is no different for indoors too. French and field beans do not require extra fertilization 

If you transplant, do not fertilize the beans at all. The fertilizer is applied before planting the seeds. The second appliance is when the bean plant is developed and ready to blossom.

How To Fertilize Beans?

After some time, beans will start to flower, add ½ cup of fertilizer for every 10 feet of row and try to throw the fertilizer in various random directions. That way, you increase fruit production. 

Almost every type of bean root grows close to the surface. Using a hoe to dig deeper the root will be harmed for sure. Be careful while harvesting.

Beans can be planted in the bed, container, and pot and if you use granular fertilization (every 5-6 weeks), switch up to liquid (3-5 weeks).

For better results, a 10-10-10 fertilizer is ideal to use for 1 1/2 pounds per 100 square feet, if you use granulated form. If you use a liquid form, always use a spraying approach, not like using a hose.

Best Fertilizers For Beans

1. Dr. Earth Organic Vegetable & Herb Fertilizer

For delicious and healthy bean production, Dr. Earth provides optimum primary nutrients for a plant with 4-6-3 NPK ratio.

The product is used not only for vegetables but also for herbs. The nice smell and non-toxic ingredients make the brand people and pets safe.

The ingredients are handcrafted and rich in multi-minerals, proteins, carbohydrates, humic acids, and other components that promote the healthiest soils capable to grow delicious flavor.

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2. Miracle-Gro Plant Nutrition Granules

As the name presents itself, Miracle-Gro will make miracles to your beans. Besides, the product performs well with edible plant nutrition such as veggies, herbs, and fruit.

To get the best results, the appliance should be between 4-6 weeks and water the bean plant regularly. The visible results will be within a week for the potted version. However, apply dry and do not pre-mix the fertilizer, just follow the instructions.

Here’s a quick guide on how to use it. For the garden plating, shake the fertilizer first and be careful to spread it evenly. Mix the topsoil for 1-3 inches and immediately water the beans. For containers, use 2 tbsp. of the nutrition and 1 gallon of container volume. and then mix, mix, mix into the soil while you plant and water.

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3. Down to Earth Organic Garden Fertilizer

Just in a 5-pound box, Down to Earth will provide a fresh start in the spring veggies including bean plants too because of the rich ingredients inside, plus the package is made out of 100% recycled products.

Speaking of ingredients, there is a total 4.0% 0.2% water soluble nitrogen 3.8% water insoluble nitrogen, 4% phosphate, 4% potash, 6% calcium, 1% magnesium and 0.4% iron.

The versatile mix has a 4-4-4 NPK ratio that you can apply 3-6 lbs per 100 square feet and mix into the top 3 inches of soil. However, the fertilization depends on the size and if it’s newly planted, throughout the growing season, use 1-2 tbsp per hole, mix into the soil, and water the container.

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Signs Of Overfertilization Beans

Everything excessive will damage the plant. As a result of overfertilization, you will get

  • Less flowering and fruit production.
  • Droop bean plant.
  • Root rotting.
  • Yellow leaves
  • The collapse of the entire bean plant.

Types of Bean Fertilizers

Picking the type of fertilizer isn’t something crucial, but the soil type will determine the type and ideal acidity. There are 3 types of fertilizers you can pick from.


Dry, granular feeders’ advantage is seeing where exactly the fertilizer is poured, so you can spread evenly and notice the missing spots. They act in a fast and slow-release manner.


Spikes are perfect for those who got no time to spend in the garden, but still want to plant beans anyway. They usually are usually in a stick form and you have to push them into the soil close to the plants.

Organic & Synthetic Fertilizers

The main distinction between organic and synthetic fertilizers stands in that synthetic ones are applied directly to the plant.

On the other hand, organic fertilizers dip the nutrients inside the soil and create microorganisms. They tend to take much time to show results, but they are more long-lasting.

A Brief Recap

Fertilizing is a must to happen process, you cannot avoid it to be clear in the first case. It doesn’t matter where you have a pot, container, or the entire garden full of beans, fertilizing should be done during springtime. 

The NPK level value requires 5-10-10, but that depends on the type of soil. Speaking of soil, beans ask for slightly acidic soil with a 5.60 – 6.50 pH level. 

You can use organic, synthetic, liquid, or granulated versions, which don’t really play an important role, but the application and amount do. In case of overfertilization, check first the leaves.

Further Reading

Get to know more about beans and find out how many black beans can you harvest per plant and how many green beans to expect per plant.

Additionally, it would be useful to know why green bean leaves turn yellow.

Stay tuned for more informational content. 


Aurora Hansen

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