How to Balance pH for Japanese Camellia

To balance the pH for Japanese camellia plants, it is crucial to maintain a slightly acidic soil pH level between 5.5 and 6.0. This guide will provide step-by-step instructions and home remedies for DIY users to ensure the optimal growing conditions for their Japanese camellia plants.

Soil Testing

The first step in balancing the pH for Japanese camellias is to test the soil. You can use a home testing kit or send a soil sample to a local extension service. This will help you determine the current pH level and whether amendments are necessary.

Amending the Soil

japanese camelliaImage source: Pixabay

If your soil pH is too high (alkaline), you can lower it by adding the following amendments:

Amendment Quantity
Sulfur Add before planting
Iron Sulfate Apply around existing plants
Sphagnum Peat Moss Apply 4-6 inches on top of existing soil

Sulfur is most effective when added before planting, while iron sulfate and sphagnum peat moss can be used around existing plants. Sphagnum peat moss is a long-lasting solution, adding adequate acidity for up to 2 years.


Use an acidic fertilizer, such as one designed for azaleas and rhododendrons, to concentrate the acidifying effect on your camellia if it is planted near other plants that thrive in alkaline soil. This will help prevent harm to the surrounding plants.

Monitoring Drainage

japanese camellia 2Image source: Pixabay

Camellias prefer consistently moist soil but do not tolerate waterlogging. If you notice yellowing leaves and wilting, it may be a sign of poor drainage or root rot. Relocate the plant to a well-drained location if necessary.

See also  How to Balance pH for Gayfeather (Liatris)

Organic Material

Incorporate organic matter, such as pine straw or compost, into the soil to help maintain acidity and improve drainage.

Shade and Temperature

Japanese camellias prefer partial shade and thrive in temperatures between 65-75°F (18-24°C) during the growing season. Protect the plant from intense afternoon sun and frost.

Home Remedies

In addition to the above methods, you can also try the following home remedies to balance the pH for your Japanese camellia:

  1. Coffee Grounds: Sprinkle used coffee grounds around the base of the plant. The acidity in the coffee grounds can help lower the soil pH.

  2. Vinegar: Mix 1 part vinegar (white or apple cider) with 10 parts water and apply the solution around the plant’s base. This can help lower the soil pH.

  3. Citrus Peels: Bury citrus peels (such as lemon or orange) around the plant’s base. As the peels decompose, they will release acids that can lower the soil pH.

  4. Aluminum Sulfate: Apply a small amount of aluminum sulfate around the plant’s base to lower the soil pH. Follow the manufacturer’s instructions for the appropriate dosage.

These home remedies should be applied every 2-3 months during the growing season to maintain the desired pH level.

Maintenance and Monitoring

Regularly monitor the soil pH and make adjustments as needed. It’s important to maintain a consistent pH level between 5.5 and 6.0 for optimal growth and health of your Japanese camellia plants.

By following these steps and using the recommended home remedies, you can successfully balance the pH for your Japanese camellia plants and ensure they thrive in your garden.

See also  How to Balance pH for Squill Plants


  1. Pennington: The Gardener’s Guide to Growing Camellias
  2. Epic Gardening: Camellia Leaves Turning Yellow
  3. Plants Rescue: Camellia Japonica