Indeed, this natural material is rich in calcium, which is essential for the proper growth and development of many garden crops.
In addition to calcium, eggshells contain potassium and phosphorus, which play a crucial role in strengthening the root system and enhancing plants' resistance to diseases. However, despite the obvious benefits, not all plants respond equally well to such fertilization. Moreover, in some cases, the use of eggshells may even harm your harvest.
Which plants do not "get along" with eggshells?
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Tomatoes
While tomatoes do require calcium, an excess of this micronutrient can lead to serious issues. When too much calcium accumulates in the soil, tomatoes risk falling ill, and their growth may slow down. If you still wish to use eggshells, apply them in very limited amounts. -
Potatoes
This crop is also sensitive to excess calcium. Adding too many eggshells to the soil can cause tubers to crack and deform. The result is not only a loss of aesthetic appeal but also a decline in crop quality.0 -
Carrots
When there is too much calcium, carrot roots become less juicy and flavorful. Additionally, this can negatively impact their structure, making carrots brittle and less appealing for storage. -
Beets
If calcium levels in the soil are too high, beets may lose their flavor and become excessively tough. This is particularly important to consider if you are growing beets for salads or preserves. -
Onions
Onions also do not tolerate an abundance of calcium. Excessive fertilization with eggshells can inhibit plant growth, negatively affecting both yield and bulb size.1
How to use eggshells wisely?
To avoid unpleasant consequences, it's important to dose and apply this type of fertilizer correctly:
- Grinding. Before use, the shells should be thoroughly crushed into a powder. This will improve calcium absorption.
- Localized application. Add the eggshells not to the entire soil layer, but directly to the planting holes of plants that truly need calcium (such as peppers or cabbage).
- Composting. Instead of directly adding the shells to the soil, incorporate them into compost. During decomposition, they will soften and distribute better in the soil.
2 Eggshells are a wonderful natural resource that can be a great aid in your garden. However, they should be used cautiously, taking into account the characteristics of each crop. Remember: what is beneficial for one plant may be harmful to another. It’s better to underfeed than to overfeed!