Which soil is best alkaline or acidic?

As a gardening and landscaping expert, I have come across the question of whether alkaline or acidic soil is best many times. The answer to this question depends on the specific plants you are trying to grow and the conditions they prefer.

First, let’s talk about alkaline soil. Alkaline soil, also known as “sweet” soil, typically has a pH level above 7. This type of soil is often found in areas with limestone or chalk deposits. Alkaline soil can be beneficial for certain plants, such as vegetables like asparagus, cabbage, and broccoli, as well as flowers like lilacs and lilies. These plants thrive in alkaline conditions and may struggle in acidic soil.

On the other hand, acidic soil, also known as “sour” soil, has a pH level below 7. This type of soil is often found in areas with pine trees or other acidic-loving plants. Acidic soil can be beneficial for plants such as blueberries, azaleas, and rhododendrons, as well as certain types of ferns and mosses. These plants prefer acidic conditions and may not perform as well in alkaline soil.

It’s important to note that while some plants have a preference for alkaline or acidic soil, many plants are adaptable and can tolerate a range of pH levels. However, extreme pH levels can cause nutrient deficiencies or toxicities, so it’s generally best to try to match the soil pH to the plants’ preferences.

To determine the pH level of your soil, you can use a soil test kit or send a sample to a soil testing laboratory. Once you know the pH level, you can make adjustments to the soil if needed. For example, if your soil is too acidic for the plants you want to grow, you can add lime to raise the pH. On the other hand, if your soil is too alkaline, you can add sulfur or aluminum sulfate to lower the pH.

In my personal experience, I have encountered situations where plants struggled to thrive due to the soil pH not being suitable for their preferences. For example, I once planted blueberries in soil that was too alkaline, and despite my best efforts to amend the soil, the plants never performed well. It wasn’t until I moved them to a more acidic location that they finally started to thrive.

The best soil pH for your garden depends on the specific plants you want to grow. Some plants prefer alkaline soil, while others prefer acidic soil. It’s important to test your soil’s pH and make adjustments if necessary to provide the optimal conditions for your plants.

Photo of author

Caroline Bates

Caroline is a Miami-based landscaper who specializes in drought-tolerant landscapes. She is the mother of two young children and also enjoys writing for GreenPacks.org in her spare time. Caroline takes great pride in her work, and loves being able to share her knowledge with others through her writing.