The Benefits Of Using Baking Soda On Your Garden Hydrangeas

The Benefits Of Using Baking Soda On Your Garden Hydrangeas

Baking soda is known for its versatility in household use, such as cleaning tough stains and eliminating odors. It is also used in outdoor gardening to enhance the color of hydrangeas and protect them from pests and diseases. By adding baking soda to the soil of hydrangea plants, their growth can be improved while reducing the risk of damage from unwanted visitors.

The acidity of soil is important for the growth and production of hydrangeas, and baking soda can alter the pH level of the soil. For optimal growth, hydrangeas require acidic soil with a pH balance between 5.2 and 5.5. Although baking soda increases alkalinity, the right amount mixed into the soil can still promote growth and enhance the vibrancy of the flowers.

While baking soda is not as effective as professional gardening products, it is a cost-effective alternative that can serve as a temporary solution until more advanced materials can be obtained. Applying baking soda to hydrangeas can provide numerous benefits, and it is easy to do.

Promotes growth and protects against enemies

Hand holding baking soda trowel


To begin, baking soda may prove useful when added to your hydrangea crop for many reasons, ranging from stimulating individual plant growth to offering protection against various threats hydrangeas may come across in the garden. Applying the product to the soil of your hydrangeas can introduce these positive effects, as can mixing it into the water you’ll use for irrigation. The substance acts as a protective barrier, keeping away annoying pests that may try to eat away at your hydrangea’s leaves, stems, or flowers, including insects and small, frequenting mammals like rabbits. Baking soda also fights back against powdery mildew that may appear on leaves after overnight condensation or contamination from other sources. Additionally, the product, when added to the plant’s soil, can prevent roots from frosting during the winter months, and acts as a coolant that keeps roots from losing all moisture during sweltering summers.

Simply mix a teaspoon’s worth of baking soda into two quarts of water and irrigate your plants as normal. If adding baking soda directly to your hydrangeas’ soil, apply a tablespoon of the product to the soil and stir until it’s evenly distributed before planting. Combine baking soda with some water and liquid dish soap to create a solution capable of eliminating mildew and other diseases that may attempt to kill your flowers. Be careful not to add concentrated baking soda directly to hydrangeas in large amounts, as too much baking soda may cause more harm than good.

✿ Read More About Flowers.

Dr Heidi Parkes

By Dr Heidi Parkes

Senior Information Extension Officer QLD Dept of Agriculture & Fisheries.