How to Balance pH for Speedwell Plants

Balancing the pH for Speedwell plants is crucial for their optimal growth and health. Speedwell, also known as Veronica, prefers a neutral to slightly alkaline soil pH of around 6.0 to 7.5. By following the steps outlined in this comprehensive guide, you can ensure your Speedwell plants thrive in the perfect soil conditions.

Soil Testing for Speedwell

The first step in balancing the pH for Speedwell is to test the soil. You can purchase a soil testing kit from a local garden center or online. Follow the instructions provided with the kit to get an accurate pH reading of your soil.

Identifying the Current Soil pH

Once you have the soil test results, you’ll know whether your soil is too acidic (below 6.0) or too alkaline (above 7.5). This information is essential for determining the appropriate amendments to add to the soil.

Amending the Soil pH for Speedwell

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Depending on the current soil pH, you’ll need to add either lime to raise the pH or elemental sulfur to lower the pH.

Raising the pH with Lime

If your soil is too acidic (below 6.0), you can add lime to raise the pH. For every 1 square meter of soil, apply 100 to 200 grams of dolomitic lime. Mix the lime into the top 15 to 20 cm of soil.

Lowering the pH with Elemental Sulfur

If your soil is too alkaline (above 7.5), you can add elemental sulfur to lower the pH. For every 1 square meter of soil, apply 20 to 40 grams of elemental sulfur. Mix the sulfur into the top 15 to 20 cm of soil.

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Waiting and Retesting the Soil pH

After amending the soil, wait for a few weeks and then retest the soil pH. It may take several weeks for the pH to adjust to the desired level.

Monitoring the Soil pH

Regularly monitor the soil pH to ensure it remains within the optimal range of 6.0 to 7.5 for Speedwell plants. If the pH starts to drift outside the desired range, repeat the amendment process.

Maintaining Soil Health for Speedwell

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Maintaining healthy soil is crucial for the overall health of your Speedwell plants. Adding a 2 to 3 cm layer of compost around the base of the plants each spring will provide essential nutrients and improve soil structure.

Watering and Sunlight Requirements

Speedwell plants prefer well-drained soil and full sun to partial shade. Water them consistently, providing about 1 inch of water per week, and ensure they receive at least 6 hours of direct sunlight daily.


By following the steps outlined in this guide, you can create the ideal soil conditions for your Speedwell plants to thrive. Remember to test the soil, amend it accordingly, and monitor the pH regularly to maintain the optimal range. With the right soil conditions, your Speedwell plants will flourish and bring vibrant color to your garden.

Garden Design: Speedwell (Veronica) Plant Profile
Plant Addicts: Fertilizing Speedwell
The Spruce: Veronica Plant Profile