DIY: Make Your Own Acidic Soil Mix for a Healthy Garden

Make Your Own Acidic Soil Mix for a Healthy Garden

Soil is made up of many different compounds. It’s important to understand the relative proportions of these compounds in order to know how to make the soil more acidic. Soil pH is a measure of how acidic or alkaline your soil is. A pH level of 7.0 is neutral, and anything below that is said to be acidic, and anything above 7.0 is said to be alkaline.

Soil pH can vary depending on the types of plants grown in it, as well as the type of soil itself. Some plants prefer an acidic environment like azaleas, while others need a more alkaline environment like roses or blueberries.

In this article, we will explain how to use sulfur-based acidifiers and make your soil more acidic.

About acidic soil

Make Your Own Acidic Soil Mix for a Healthy Garden

Soil is composed of four main components: sand, silt, clay, and organic matter. Sand and silt are the particles that make up most of the soil. Clay is a very fine particle that makes up about 30% of soil by volume. Organic matter is any material that comes from living organisms such as plants and animals.

Organic matter decomposes slowly over time and forms humus, which is dark brown or black in color. Humus improves the physical structure of your soil by increasing water-holding capacity and aeration while reducing compaction. Humus also helps improve drainage by increasing porosity (air spaces).

A soil test may be done in order to determine if acidic soils exist in your yard or garden area due to high amounts of humus content in the soil. Acidic soil has a pH of less than 7, and most plants prefer neutral to slightly alkaline (ph 7) soil. Soil acidity is a measure of the concentration of hydrogen ions in the soil. The more acidic the soil, the more hydrogen ions are present. Acidic soils can cause problems for plants because they prevent nutrients from being absorbed into plant roots correctly due to an excess amount of acidity in the soil.

Tips to make the soil more acidic

Use Acidic Fertilizer

Make Your Own Acidic Soil Mix for a Healthy Garden

Soil that is too alkaline can be caused by a number of factors, including the type of soil used to start your garden and the amount of water you use. You can add acidifying fertilizer to your soil to make it more acidic, but you should only do so if you are sure that your plants will benefit from this change. It is actually a simple and effective way to increase the pH of your soil. The reason for this is that acidic fertilizers contain ingredients that release acids as they break down in the soil.

These acids lower the pH level, which in turn increases the number of nutrients available to plants. Acidic fertilizers are crucial for plants that prefer an acidic environment, like azaleas and blueberries. Acidic fertilizers can be found in two forms: inorganic and organic. Inorganic acid is usually made from sulfuric acid and can be applied directly to the soil. Organic acids are made from natural sources, such as peat moss or pine needles, and must be applied to the soil as an amendment.

Add Iron Sulfate

Make Your Own Acidic Soil Mix for a Healthy Garden

If you want to make your soil more acidic, there are a few different methods you can try.

The first method is adding iron sulfate, which will increase the acidity of the soil by removing oxygen, thereby creating anaerobic conditions. Iron sulfate is highly soluble in water, making it easy to add to your soil. The chemical reaction that occurs when you add iron sulfate to your soil helps convert calcium carbonate into calcium sulfate and carbon dioxide gas. This process makes the pH of the soil more acidic.

This is a good option if you want to grow plants that require an acidic environment and do not mind having them in a confined space for a period of time. Iron sulfate is a type of iron salt that contains sulfur. Sulfur is an essential nutrient for plants, but it occurs naturally in the soil at low levels. If you want to increase the amount of sulfur your plants receive, adding iron sulfate will do this by allowing the plant’s roots to absorb it more easily. You can also add iron sulfate to your soil if you have existing plants that have been growing in alkaline soil and want them to thrive on their own without having to relocate them somewhere else.

Add Aluminum Sulfate

Make Your Own Acidic Soil Mix for a Healthy Garden

Aluminum sulfate (alum) is a chemical compound that can be used to make the soil more acidic. It’s a natural product, so it’s safe for plants.

Alum is made up of aluminum, sulfuric acid, and water. When you add alum to your soil, it reacts with the calcium carbonate in your soil to form aluminum hydroxide, which is less soluble than calcium carbonate. This means that more aluminum hydroxide will be available in your soil solution for plants to use.

Using alum is an easy way to get your plants started in an acidic environment without having to deal with the complications caused by adding too much lime or sulfuric acid directly into your soil. The best way to apply aluminum sulfate is by mixing it with water and then watering your plants with this mixture.

One teaspoon of aluminum sulfate will treat 1 gallon of water. You can also add it directly to the soil around your plants, although this isn’t as effective because the plant roots won’t be able to absorb as much of the chemical if it’s applied in this way.

Add Sphagnum Peat Moss

Make Your Own Acidic Soil Mix for a Healthy Garden

If you want to make your soil more acidic, the first step is to add Sphagnum peat moss. Sphagnum peat moss is a plant that grows in acidic boggy areas. It’s a good source of nitrogen, phosphorus, and potassium, which can help your plants grow. This is a type of moss that has been used in gardening for generations and is known for being able to help reduce the pH level of your soil.

When you add Sphagnum peat moss, it will act like a sponge and absorb water from the soil so that the water becomes more acidic. You can then use this water to water other plants that need less-acidic soil.

You can also use Sphagnum peat moss as a mulch on top of your garden, as it will help keep weeds from growing and will also prevent evaporation from happening so quickly so you don’t have to water as much. To use it as an acidifier, simply mix it with your existing soil in a ratio of about one part peat moss to three parts existing soil (or the other way around if you want to increase the acidity).

Add Sulfur

Make Your Own Acidic Soil Mix for a Healthy Garden

Sulfur is a naturally-occurring mineral that can be added to soil to help make it more acidic. Sulfur is often used in commercial gardening to help plants thrive in alkaline soil. Adding sulfur to your garden can help you grow plants that you might not be able to grow otherwise, like blueberries and azaleas. When sulfur is added to soil, it reacts with the chemicals already present in the soil to create hydrogen sulfide gas.

This gas makes the soil acidic, which is beneficial for growing plants that prefer an acidic environment like blueberries and rhododendrons. The best way to add sulfur to your soil is by spreading it out over the ground in a thin layer before or after you plant your plants. You can also sprinkle it directly on top of the soil when planting seeds, but this method is less effective because of how easily it can be washed away by rain.

Add Ammonium Sulfate

Make Your Own Acidic Soil Mix for a Healthy Garden

Ammonium sulfate is a common fertilizer product that you can find at your local garden center. It’s a good idea to apply ammonium sulfate to the soil when you want to make it more acidic.

Ammonium sulfate is a natural chemical compound, and it’s also called ammonium polysulfide, which means that it contains multiple sulfur atoms. Its chemical formula is (NH4)2SO4.

This fertilizer product helps plants absorb more nitrogen, which makes it a great choice for people who are looking for ways to reduce the pH level of their soil.

When you add ammonium sulfate to your soil, it will help remove excess salts from the ground by helping them precipitate out of the solution so they don’t interfere with plants’ ability to absorb nutrients from the soil or water supply.

Add Pine Needles

Make Your Own Acidic Soil Mix for a Healthy Garden

Pine needles are acidic, and they’re really good at breaking down organic matter. You can use them to make your soil more acidic, but you’ll need to add them slowly—too much will overwhelm the soil and make it too acidic for your plants.

The best way to do this is by mixing in about a half-cup of pine needles per gallon of soil (you’ll want to mix them in with a trowel). Once you’ve added in enough pine needles to give your soil a strong, piney smell, stop adding until your plants start showing signs of distress due to over-acidification. Then, add another half-cup of pine needles per gallon of soil.

If you need to raise the pH of your soil after using pine needles, try using oak leaves instead. Oak leaves are alkaline, so they’ll help neutralize any excess acidity from the pine needles.


If you want to make the soil in your garden more acidic, there are a few ways to do it. Acidic soil is a common problem for gardeners who want to grow vegetables and fruits. There are several ways to correct the pH of your soil, but using aluminum sulfate is probably the best way to do so. soil tends to be naturally acidic, so it is important to check the pH of your soil before you start adding any products that are meant to change its acidity. Acidic soil can be helpful for plants that prefer this environment, but it is not necessary for all plants.


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