Introduction

As a potted plant enthusiast, you may have noticed that some plants may struggle or even die due to low soil pH levels. The soil pH level directly affects the plant's ability to absorb essential nutrients, water, and oxygen. To promote healthy growth, it's essential to maintain the correct soil pH level by increasing it when necessary.

Test the Soil pH Level

Before adjusting the soil pH level, you need to measure the current pH level to determine how much it needs to increase. You can buy inexpensive soil pH testing kits from gardening stores, or you can send a soil sample to a professional lab for a more accurate result. Once you determine the soil pH level, you can determine the appropriate treatment method.

Add Limestone to the Soil

One of the most common ways to increase soil pH levels in potted plants is to add limestone. Limestone is a natural, organic material that contains a high amount of calcium carbonate. Calcium carbonate reacts with soil water to create calcium ions and bicarbonate ions, which neutralize acid in the soil. To add limestone to the soil, mix a small amount of finely ground limestone with the potting soil before planting, or sprinkle the limestone on the soil surface and water it in.

Use Wood Ash

If you have a wood-burning fireplace or stove, you can use the wood ash to increase soil pH levels. Wood ash contains potassium, calcium, and magnesium carbonate, which can help neutralize acidic soil. To use wood ash as soil amendment, mix one tablespoon of wood ash per small pot or four tablespoons per large pot with the potting soil before planting. Alternatively, sprinkle a thin layer of wood ash on the soil surface, and water it in.

Apply Agricultural Lime

Agricultural lime is a commercial product that contains a high amount of calcium carbonate. It's readily available at garden centers or online. Agricultural lime is a fine powder that you can mix with the potting soil or sprinkle on the soil surface and water it in. Agricultural lime is more effective than limestone because it reacts with the soil water faster and has a higher concentration of calcium carbonate.

Add Dolomite Lime

Dolomite lime is another soil amendment that you can use to increase soil pH levels. Dolomite lime contains both calcium carbonate and magnesium carbonate. If your potted plants need both calcium and magnesium, dolomite lime is an excellent choice. Mix a small amount of dolomite lime with the potting soil before planting or sprinkle it on the soil surface and water it in.

Conclusion

Increasing soil pH levels in potted plants is crucial to promote healthy growth and avoid nutrient deficiencies. Depending on the current pH level and the plant's requirements, you can use different soil amendments to adjust the pH level. Always follow the recommended dosage and application method for each product, and monitor the plant's growth regularly to ensure that the pH level is optimal.