How to Balance pH for Snakeroot (Ageratina altissima)

Maintaining the optimal soil pH is crucial for the healthy growth and development of snakeroot (Ageratina altissima), a perennial herb native to North America. This comprehensive guide will walk you through the step-by-step process of balancing the pH for your snakeroot plants, ensuring they thrive in their ideal growing conditions.

Soil Testing for Snakeroot

The first step in balancing the pH for snakeroot is to test the soil. You can use a home soil testing kit or send a sample to your local agricultural extension service. This will provide you with the current pH level of your soil, which is essential for determining the necessary adjustments.

Adjusting Soil pH for Snakeroot

snakerootImage source: Pixabay

Based on the soil test results, you can take the appropriate actions to adjust the pH to the optimal range of 6.0 to 7.5 for snakeroot.

Raising Soil pH

If your soil pH is below 6.0, you’ll need to add lime to raise the pH. The amount of lime required will depend on the soil type and the current pH level. As a general guideline, for every 1 point increase in pH, you’ll need to add 5-10 pounds of dolomitic lime per 100 square feet of garden area.

Lowering Soil pH

If your soil pH is above 7.5, you’ll need to add elemental sulfur or a sulfur-containing product to lower the pH. For every 1 point decrease in pH, you’ll need to add 1-2 pounds of elemental sulfur per 100 square feet of garden area.

Incorporating Amendments

Once you’ve determined the appropriate amendments, mix them thoroughly into the top 6 inches of soil. It’s important to wait 2-3 months before planting to allow the pH to adjust properly.

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Monitoring Soil pH

snakeroot 2Image source: Pixabay

Regularly testing the soil pH and making adjustments as needed is crucial for maintaining the optimal conditions for your snakeroot plants. Retest the soil every few months and make any necessary changes to keep the pH within the 6.0 to 7.5 range.

Additional Care for Snakeroot

In addition to balancing the soil pH, there are a few other important factors to consider when growing snakeroot:

Light Requirements

Snakeroot prefers partial sun, so choose a location that receives a balance of sunlight and shade.


The optimal temperature range for snakeroot is between 60-80°F.


Keep the soil consistently moist, but avoid waterlogging the plants.

Handling Precautions

Snakeroot contains a toxin called tremetol, which can cause illness in humans and animals. Exercise caution when handling the plant.

By following these guidelines, you can successfully balance the pH for your snakeroot plants and provide them with the ideal growing conditions for a healthy and thriving garden.