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5 July 2009
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Soil

Soil Testing

It's important to know your soil before buying plants. Follow our guide and find out how to recognise the different types.

What to do

  • The pH of your soil can be tested with a simple kit available at garden centres. The solution turns yellow-orange for acid soil, green for neutral and dark green for alkaline.
  • Most plants prefer a pH of 6.5 to 7 – the point where nutrients are most easily available.
  • Some plants are ericaceous meaning they need acid soil, for example most rhododendrons. Others grow better in an alkaline soil, for example lilacs.
  • The soil type is determined by relative quantities of organic matter, rock and mineral particles.
  • An easy way of determining which type you have is by picking up some damp soil, examining it and rubbing it between your fingers.
  • Clay soil will be a bit sticky and be easy to roll into a ball.
  • Sandy soil will feel gritty and won't hold together at all.
  • Silty soil will feel silky and won't hold together into a ball like clay but will make a roll.
  • Loamy soil is brown and crumbly in texture, and has lots of organic matter in it.
  • Chalky soil is very light and doesn't hold water well, and you'll find chunks of white chalk or flint when you dig. It's always alkaline.
  • Peaty soil is almost black to look at, spongy to the touch and holds a lot of water.

  • Read More...

Time needed


Ten minutes to test pH and determine soil type

What you need

  • Soil testing kit
  • Damp soil

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