How to Balance pH for Bouvardia: A Comprehensive Guide

Bouvardia, also known as the Firecracker Bush or Hummingbird Flower, is a beautiful flowering plant that requires specific care to thrive. One crucial aspect of growing healthy Bouvardia is maintaining the proper soil pH level. In this article, we will discuss how to balance pH for Bouvardia, the identification process, specific caring processes, and home remedies for DIY users.

What is the Ideal pH Range for Bouvardia?

Bouvardia plants thrive best in slightly acidic soil with a pH range between 6.0 and 6.5. Maintaining the soil pH within this range is essential for optimal growth and flowering. If the pH level is too high or too low, it can lead to nutrient deficiencies, stunted growth, and poor blooming.

How to Test Soil pH for Bouvardia?


To determine the current pH level of your Bouvardia’s soil, you can use a soil pH testing kit, which is readily available at most garden centers or online. Follow these steps to test the soil pH:

  1. Collect a small soil sample from around your Bouvardia plant, about 2-3 inches deep.
  2. Mix the soil sample with distilled water in a clean container, following the instructions provided with your pH testing kit.
  3. Dip the pH test strip into the soil-water mixture and wait for the specified time.
  4. Compare the color of the test strip with the color chart provided to determine the pH level.

Adjusting Soil pH for Bouvardia

If the soil pH is not within the ideal range for Bouvardia, you can adjust it using the following methods:

Lowering Soil pH

To lower the soil pH and make it more acidic, you can use vinegar or lemon juice. For every gallon of water, add 1 tablespoon of white vinegar or lemon juice to decrease the pH by approximately one point. Apply this solution to the soil around your Bouvardia plant, being careful not to overdo it, as extreme changes can harm the plant.

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Raising Soil pH

To raise the soil pH and make it less acidic, you can use baking soda. For every gallon of water, add 1 tablespoon of baking soda to increase the pH by approximately one point. Apply this solution to the soil around your Bouvardia plant, being mindful not to make drastic changes that could damage the plant.

Watering and Fertilizing Bouvardia

Bouvardia 2

In addition to maintaining the proper soil pH, watering and fertilizing your Bouvardia correctly is crucial for its health and growth.


Bouvardia plants prefer moist but not soggy soil. Water your plant once or twice a week, depending on its location and environmental conditions, providing approximately 1-2 inches of water per week. During hot summers, Bouvardia may require more frequent watering, especially if grown in containers. Ensure proper drainage to avoid root rot.


Fertilize your Bouvardia during early spring with a slow-release fertilizer specifically designed for flowering trees and shrubs. Follow the manufacturer’s instructions for application rates. If you have clay soil, mix organic matter into it to improve aeration, promote drainage, and enhance soil fertility. Avoid excessive fertilization, which might result in leggy plants and tall stems flopping over.

Pruning Bouvardia

Regular pruning is necessary to maintain the shape and health of your Bouvardia plant. While frequent pruning isn’t usually required, you can cut back about one-third of the plant’s height in midsummer to promote a more compact and bushy appearance. Deadheading spent flowers is not essential for re-blooming, but it helps keep the plant looking tidy.

How Long Does it Take to Balance pH for Bouvardia?

The time required to balance the soil pH for Bouvardia depends on the current pH level and the extent of the adjustment needed. It is essential to make gradual changes over several weeks to avoid shocking the plant. Monitor the soil pH every 2-3 weeks and make adjustments as needed until the desired pH range is achieved.

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Temperature and Humidity Requirements for Bouvardia

Bouvardia plants prefer temperatures between 60°F and 80°F (15°C to 27°C) and moderate humidity levels. If growing Bouvardia indoors, ensure they receive plenty of bright, indirect sunlight and avoid overwatering, as they prefer slightly drier conditions than many other common indoor plants.

Home Remedies for Balancing Soil pH

In addition to using vinegar, lemon juice, or baking soda to adjust soil pH, there are several home remedies you can try:

  • Coffee grounds: Sprinkle used coffee grounds around your Bouvardia plant to help lower the soil pH gradually.
  • Eggshells: Crush dried eggshells into a fine powder and mix them into the soil to help raise the pH level.
  • Pine needles or oak leaves: Mulch your Bouvardia with pine needles or oak leaves to help maintain a slightly acidic soil pH.

By following these guidelines and regularly monitoring your Bouvardia’s soil pH, you can ensure that your plant receives the optimal growing conditions it needs to thrive and produce beautiful blooms year after year.

1. Firecracker Bush (Scarlet Bouvardia, Trompetilla, Clavillo)
2. How to Grow Bouvardia (Hummingbird Flower)
3. Bouvardia: How to Grow & Care for Bouvardia Plants