To grow them, the soil pH must first be lowered, by amending the soil with elemental sulfur.

To find out yoursoil pop in, first, you have to test the pH levels of the soil.

The pH scale uses numbers 1 to 14 with soil testing below 7 as acidic.

Overhead view of a gardener holding a handful of soil in the garden

The Spruce / Jayme Burrows

Test results above 7 indicate an alkaline soil.

Lowering your soil pH is often a long-term project.

Here’s how to lower your soil pH in four easy steps.

Testing soil pH in a glass bowl with water

The Spruce / Jayme Burrows

Results include pH as well as primary and secondarynutrients and micronutrientsthat your sample may be lacking.

You should allow about a month before planting following a sulfur app.

Adding sulfur in fall or winter will not give the desired result.

Materials needed to change the pH of soil

The Spruce / Jayme Burrows

Making adjustments to soil composition also is the easiest and most effective before you plant.

This isn’t always practical but take care to use the best methods and materials to avoid root damage.

Warning

Always take precautions when working with chemical substances.

Using a hand spreader to apply sulfur

The Spruce / Jayme Burrows

Gloves, safety glasses, and protective clothing can prevent unintended burns and other skin and eye irritations.

It is often labeled as sulfur but may also be called soil acidifier.

It’s usually sold by the pound in five to 50-pound bags as dust or small particles.

Working the sulfur into the soil with a hand rake

The Spruce / Jayme Burrows

Water the Treated Planting Bed

Tilling and watering in the sulfur gives faster results.

Wet the soil but avoid drenching.

Too much water dilutes the program with less benefit.

Watering the garden bed before planting

The Spruce / Jayme Burrows

Wait to Plant

Give the sulfur utility about a month to work before planting.

This ensures more even soil distribution and prevents exposing plantings to concentrated acidity.

What Can Affect Soil pH?

Preparing to plant in the amended soil

The Spruce / Jayme Burrows

The natural pH of the soil is determined by the bang out of rock from which it formed.

Some organic fertilizers can also reduce pH, slowly.

Minerals and salts in hard water and large amounts of wood ash raise the pH of soil.

Chicken manure works best for acidifying soil but all types should be aged before being added to garden soil.

Pine products including mulches, barks, and needles lower pH but break down very slowly.

Can I use vinegar to lower soil pH?

It is not a good idea to use vinegar to lower soil pH.

Vinegar also needs to be diluted before it is added to the soil, which can be very time-consuming.

This makes maintaining the best balance for plants an ongoing process.

Ammonium nitrate works quickly but is also depleted quickly, creating a need for repeat applications.