Garden Help
Diagnose plant problems and treat garden pests


Get Gardening Help!

Home > Projects >

How to pH Test Soil


You will need: pH Testing Kit

It is important to know the pH of your soil before you plant. Some plants prefer more acidic soil (lower pH) and some plants prefer alkaline (higher pH). Home testing kits are readily available and are easy to use.

Best time to do it:

JanFebMarAprMayJunJulAugSepOctNovDec

Step 1

Step 1 of How to pH Test Soil

Take a sample of soil from 10cm below ground level in the area you wish to plant and place it, with the indicator chemical, in the testing tube.

Step 2

Step 2 of How to pH Test Soil

Add the required amount of de-ionised water to the tube to make a solution.

Step 3

Step 3 of How to pH Test Soil

Seal the top of the tube and shake the contents well for several minutes. Then stand upright and allow the mixture to settle for at least 30 minutes.

Step 4

Step 4 of How to pH Test Soil

Once the mixture has settled check the colour against the pH chart. The red end of the spectrum is acidic, green is neutral and blue to purple is alkaline.

Related FAQs


Ask a gardening question:




Latest Gardening News



Latest Gardening & Horticultural Careers


Explore Gardens from Around the World


Nongnooch Tropical Garden
Pattaya, Thailand

The New York Botanical Garden
New York, United States

Pamplemousses Botanical Garden
Pamplemousses, Mauritius



Watch a Video!

How can I get rid of mushrooms growing in my lawn?
How can I get rid of mushrooms growing in my lawn?
Why are there brown / black marks on my Hellebores?
Why are there brown / black marks on my Hellebores?
Is it safe to compost rhubarb leaves?
Is it safe to compost rhubarb leaves?
When and how should I prune a jostaberry?
When and how should I prune a jostaberry?
How do I
How do I 'thin' grape bunches?
How do I prune lavender?
How do I prune lavender?