How to Balance pH for Mallow Plants

Maintaining the optimal pH level is crucial for the healthy growth and development of mallow plants. Mallow plants thrive in slightly alkaline soil, with a pH range of 6.5 to 7.5 being ideal. By following a few simple steps, you can effectively balance the pH for your mallow plants and ensure they reach their full potential.

Soil Testing: The First Step

Before you begin amending your soil, it’s essential to test the pH level. You can use a home testing kit or send a soil sample to a local extension service. This will provide you with a baseline understanding of your soil’s pH and help you determine the necessary adjustments.

Adjusting the Soil pH

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If your soil’s pH is too acidic (below 6.5), you can add lime to raise the pH. For every 1 point you want to raise the pH, add 5 to 10 pounds of dolomitic lime per 100 square feet of garden area. If your soil is too alkaline (above 7.5), you can add elemental sulfur or a sulfur-containing product to lower the pH. Add 1 to 2 pounds of sulfur per 100 square feet to lower the pH by 1 point.

It’s important to note that the timing of these amendments is crucial. The best time to amend your soil is in the fall or early spring, allowing the soil amendments time to integrate before the planting season.

Monitoring and Maintaining pH

After amending your soil, it’s essential to monitor the pH regularly. Retest the pH every few months to ensure it remains within the ideal range of 6.5 to 7.5. This will help you identify any changes and make additional adjustments as needed.

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Watering and Fertilizing

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When watering your mallow plants, use filtered water at room temperature. Tap water can sometimes contain chemicals that can affect the soil’s pH. Additionally, fertilize your mallow plants annually with a slow-release, well-balanced fertilizer with an N:P:K ratio of 10:10:10. Be cautious not to over-fertilize, as this can lead to nutrient burn and affect pH levels.

Sunlight Requirements

Mallow plants thrive in at least 6 to 8 hours of direct sunlight daily, with a preference for more exposure to the morning light, especially during the summer months.

By following these steps, you can effectively balance the pH for your mallow plants and create an optimal growing environment for their healthy development.


Maintaining the proper pH balance is crucial for the success of your mallow plants. By testing your soil, amending it accordingly, monitoring the pH, and providing the right growing conditions, you can ensure your mallow plants thrive and reach their full potential.

Remember, the key to balancing the pH for mallow plants is to keep the soil within the ideal range of 6.5 to 7.5. With a little effort and attention, you can create a thriving mallow garden that will bring beauty and joy to your outdoor space.


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