Test your soil to find out what will grow best in your garden. Whenever you take on a new garden, finding out the acidity – or pH – of your soil should be high on the priority list. Even if you've been growing on the same spot for a while, testing soil regularly keeps tabs on any gradual changes.
Soil acidity has real practical implications because it affects the nutrients different types of plants can absorb. Some plants do best in acid soil, while others prefer alkaline.
Acid soil, with a pH of 6.5 or less, is ideal for the needs of plants like rhododendrons, pieris, heathers and camellias - often referred to as 'ericaceous' plants. Alkaline soil, on the other hand, is great for growing peonies, clematis and irises. Acidic soils also harbour clubroot in brassicas, and if your soil is too alkaline potatoes and most fruit fails to thrive.
Soil testing kits are simple to use; mix soil with water and add the chemical, which changes colour according to the pH of your soil which you then compare on a pH colour chart. Most soils are neutral, with a pH of 7: below that, your soil is acid, and above it's alkaline.
