How to Fix Calcium Deficiency in Pepper Plants?

To fix calcium deficiency in pepper plants, amend the soil with gypsum. Ensure a balanced fertilizer with sufficient calcium, and maintain consistent watering. Mulching helps regulate soil moisture. Consider adding eggshells or bone meal for a natural calcium boost.

Plants need calcium to grow well and stay strong. For peppers, if they don’t have enough calcium, they might not grow as much fruit.

If your plants grow slowly, it might be due to a lack of calcium. To fix this, you must address calcium deficiency on time, or your plants could become stunted and weak. While calcium deficiency means your plants lack this nutrient, solving the issue isn’t just about adding more to the soil or solution—it needs other things as well. Let’s see what other things will be.

What causes Calcium Deficiency in Pepper plants?

You might be assuming calcium deficiency comes from not having enough calcium. While that’s part of it, it’s not the whole thing. Simply having sufficient calcium in your soil doesn’t guarantee your plants get all they need. Various factors play a role in causing calcium deficiency, and they are below.

1. Loss of water

Insufficient water can restrict your pepper plants from taking in calcium, even if it’s available in the soil. When the soil is overly dry, the roots struggle to draw up nutrients, leading to plant distress. This often results from an irregular watering routine, but it can also be influenced by the soil type.

2. Plant get a lot of nitrogen

The plant directs calcium to the leaves instead of the fruit. When a plant receives ample nitrogen, its leaves grow quickly. Fast-developing leaves have a higher ability to compete for calcium ions compared to the fruit.

3. Type of soil

Often, the root cause of your pepper plant’s calcium deficiency lies in the soil type. Soil colloids retain calcium, but when it combines with released hydrogen ions, the soil turns excessively acidic. Sandy and coarse soils, common culprits, are usually highly acidic, and unable to retain sufficient nutrients like calcium. Conversely, alkaline soil types generally contain higher levels of calcium.

4. Too much fertilizer

Applying a phosphorus-rich fertilizer during the growth stage promotes plant growth. However, improper fertilization of your pepper plants, whether excessive or insufficient, can result in calcium deficiency. Excess phosphorus can interfere with the plant’s absorption of various nutrients, including calcium and in the end contribute to deficiency. As well as insufficient fertilizer can hinder the plant from absorbing essential nutrients. Adequate phosphorus is crucial for efficient plant root function. When phosphorus is insufficient, the plant may also struggle to absorb required nutrients.

5. Plant stress

Growing pepper plants in unfavourable conditions can cause stress and hinder their normal growth processes. Overcrowding restricts proper air circulation and triggers competition for nutrients among the pepper plants, resulting in root problems.

6. pH level

The availability of calcium is significantly affected by pH levels. If the pH of your soil or solution is below 6.0, it creates a challenging environment for plants to efficiently take up this vital nutrient. Maintaining a balanced pH is key to ensuring that your plants can readily absorb and benefit from the calcium they need for strong growth and development.

Check this: Bell Pepper Farming Guide

How to Fix Calcium Deficiency in Pepper Plants?

To fix calcium deficiency in pepper plants, start by selecting suitable soil and a favourable location for optimal growth. Evaluate nutrient levels, ensure proper watering, and provide adequate fertilization to prevent deficiencies. Let’s see further in detail how to fix it.

1. Water regularly

Make sure the soil isn’t overly dry, as insufficient watering may be the reason for the plant’s inability to draw up nutrients. Pepper plants require watering when the soil feels slightly dry. The frequency can vary, with a need for daily watering in hot summer months and less frequent watering as temperatures decrease.

Mulch proves to be a valuable asset in preventing soil from drying out. Applying a layer of mulch not only retains moisture but also helps maintain the ideal temperature for pepper plants

2. Choose the right fertilizer

Ensure to steer clear of ammonia-based or nitrogen- and potassium-rich variations of fertilizers. Although nitrogen aids soil improvement, it can stress pepper plants during droughts. Excessive nitrogen, whether from manure or chemical fertilizers, hinders calcium absorption and stunts plant growth. Instead, go for a liquid fertilizer and apply it by spraying it onto the leaves.

3. Check the soil

It’s a saying that “prevention is better than cure”. So, before you start growing peppers, test your soil. This not only helps with calcium but also other nutrients. Knowing what your soil needs lets you take the right steps to keep your plants healthy from the start.

4. Add calcium

If your soil lacks calcium, you can improve it by adding calcium nitrate or a fertilizer rich in calcium chloride to your pepper plants. If you prefer avoiding chemicals, you can enhance the soil organically by using bone meal, eggshells, dolomite lime, or gypsum. These natural alternatives work well to amend the soil and boost calcium levels for your pepper plants. But, be careful not to overdo it.

5. Conditions for growth

Excessive humidity can impact the transpiration process and ultimately lower calcium levels in your pepper plants. It’s recommended to grow your pepper plants in moderately humid conditions to ensure efficient nutrient absorption.

6. Give them space

For good root development, pepper plants are ideally spaced around 18 inches apart. Yet, if the temperature drops below 60 degrees Fahrenheit, then bring them closer together.

7. Nutrient Levels

While enhancing your soil to boost calcium levels, ensure you’re not neglecting other essential nutrients. Calcium forms bond with both micro and macronutrients through ionization, and a deficiency in these nutrients can impact its absorption.

Also Read: How Many Green Peppers Per Plant?

What are the Signs of Calcium Deficiency in Pepper Plants?

Here are some signs you can look out for in your pepper plant –

1. Discoloration of leaves

Brown spots, particularly tip burn on leaf margins, can signify calcium deficiency, alongside overall yellow chlorosis across leaves. If neglected, this deficiency may progress, leading to complete necrosis of leaves.

2. Rot

The occurrence of various types of rot on new leaves, fruits, and flowers could be an indication of a calcium deficiency. If you observe blossom end rot above ground, it may show you the presence of root rot below ground as well.

3. Leaf Curling

Insufficient calcium can lead to the curling of new growth in plants. If you observe new leaves curling inward, is likely to be a calcium deficiency.

4. Stunted Growth

If your plants are noticeably slow to reach maturity, it’s best to examine your soil for potential calcium or nutrient deficiencies. While it might not be the only cause, curing this possibility will help in identifying and resolving the underlying issue.

Also Read: Why Are Eggshells Good for Pepper Plants?

How to Prevent it from Beginning?

Here are some tips you can follow to prevent calcium deficiency in pepper plants from the beginning.

1. Before planting peppers, perform a soil test to identify calcium deficiency.

2. Adjust fertilizer mix based on soil test results.

3. Choose organic options like gypsum and bone meal to boost calcium without putting in excess nitrogen.

4. Enhance future calcium levels by including eggshells in your compost.

5. Ensure pepper plants receive sufficient water, especially during dry periods and fruit growth.

6. Adjust watering practices based on seasonal needs to maintain good soil moisture.

7. Prepare the soil thoroughly to prevent compaction.

Avoid soil compaction to promote efficient water uptake by pepper plant roots.


Addressing calcium deficiency in pepper plants involves a thorough process—from selecting the right soil to monitoring nutrient levels, practising effective watering, and considering environmental factors. 

Organic amendments like bone meal and eggshells offer sustainable solutions. Moreover, there are various homemade remedies also available. You can try them too.

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