How to Balance pH for Torch Lily

To balance the pH for a Torch Lily (Kniphofia uvaria), also known as Red Hot Poker, aim for a slightly acidic to neutral pH between 6.0 and 6.5. This step-by-step guide provides advanced hands-on details and home remedies to help DIY users achieve the optimal pH for their Torch Lily plants.

Soil Testing

The first step in balancing the pH for your Torch Lily is to test the soil’s pH level. You can use a home testing kit or send a soil sample to a local extension service for a more accurate analysis.

Adjusting pH

torch lilyImage source: Pixabay

Based on your soil test results, you can adjust the pH accordingly:

  • If your soil is too alkaline, add elemental sulfur or a sulfur-containing product to lower the pH.
  • For acidic soil, add lime to raise the pH.

The amount of amendment needed depends on your soil test results, but a general guideline is:

  • 1 to 2 pounds of elemental sulfur per 100 square feet to lower pH by one unit
  • 5 to 10 pounds of lime per 100 square feet to raise pH by one unit


It’s best to make pH adjustments in the fall or early spring, giving the soil time to adjust before planting.

Shade and Temperature

torch lily 2Image source: Pixabay

Torch Lilies prefer full sun but can tolerate light afternoon shade in hot climates. They thrive in USDA hardiness zones 6-9, with an optimal temperature range of 70-85°F during the day and 50-60°F at night.


Water your Torch Lilies regularly, providing about 1 inch of water per week, and let the soil dry out between waterings. Make sure the water saturates the soil 5 to 6 inches deep each time.

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Amend the soil at planting with a 2- to 3-inch thick layer of compost. Each spring, apply a dry granular, balanced, organic fertilizer.


Deadhead spent flowers in summer as they fade to encourage more flower stalks to form. In late fall in warm areas, tie the leaves into a canopy over the crown to prevent water from accumulating in the center of the plant in winter. In early spring, cut the foliage back to 3 inches off the ground to clean up the plant and allow new foliage to emerge.

Home Remedies

For home remedies, consider the following:


Adding compost to your soil can help balance pH and provide rich organic matter for your Torch Lily to thrive.

Peat Moss

Adding a small amount of peat moss to ‘lighten’ the soil can also help balance pH and improve drainage.


For slightly alkaline soils, adding vinegar can help lower pH. However, be cautious as vinegar is acidic and can harm plants if overused. A general guideline is 1 cup of vinegar per 100 square feet to lower pH by one unit.

Remember to monitor your Torch Lily’s growth and adjust the pH as needed throughout the growing season. With the right soil conditions and care, your Torch Lily will thrive and reward you with its vibrant, fiery blooms.

YouTube Video on Torch Lily Care
Better Homes & Gardens Article on Torch Lily
The Garden Helper Article on Torch Lily