How to Change Soil pH in Potted Plants

If you want your potted plants to thrive, it's important to ensure that their soil pH is within an appropriate range. Soil pH affects the availability of nutrients to plants, and certain plants thrive in soil with specific pH ranges. Luckily, there are several ways to change soil pH in potted plants.

1. Test the Soil pH

The first step in changing soil pH is determining the soil's current pH level. You can purchase a soil pH test kit at a garden center or online. Soil pH testers typically come with instructions, but it's important to follow them closely for accurate results. Once you obtain your reading, you'll know if the soil pH is too high or too low.

2. Add Lime to Increase Soil pH

If the soil pH is too low (meaning it's acidic), you can add lime to increase the pH level. Lime is a commonly used soil amendment that contains calcium and magnesium, which can help neutralize acidity. The amount of lime needed varies depending on the size of the pot and the amount of soil, so be sure to follow the instructions on the lime package. After adding lime, mix it in thoroughly and let it sit for a day or two before watering.

3. Add Sulfur to Decrease Soil pH

If the soil pH is too high (meaning it's alkaline), you can add sulfur to decrease the pH level. Sulfur is a natural element found in the soil, and it works by slowly acidifying the soil over time. Again, the amount of sulfur needed varies depending on the pot size and soil amount, so follow the instructions on the sulfur package. Mix sulfur thoroughly into the soil and let it sit for a day or two before watering.

4. Use Acidic Fertilizers

If you don't want to add amendments to your soil, you can use fertilizers that are designed for acidic-loving plants. These fertilizers contain natural or synthetic acidifiers that can help lower soil pH. Some examples of acidic fertilizers include pine needle mulch and peat moss. However, be cautious not to overuse fertilizer as it can negatively affect plant growth.

5. Water with Vinegar

Vinegar is another natural way to lower soil pH. Mix two tablespoons of vinegar in one gallon of water and water your plants as usual. However, be careful not to overuse vinegar as it can harm your plants if not used properly.

Summary

Changing soil pH is essential for ensuring your potted plants thrive. Testing the soil pH is the first step, followed by adding amendments such as lime or sulfur, using acidic fertilizers, or watering with vinegar. Remember to follow instructions carefully and avoid overusing amendments or vinegar. By taking these steps, you can create the perfect pH level for your potted plants and help them grow healthy and strong.