The following is a list of ericaceous plants that require acid soil or ericaceous compost.
Ericaceous plants require an acidic soil or ericaceous compost in which to thrive. Acid soil has a pH value of less than 7. These plants are also known as calcifuge, or lime-hating plants (lime being alkaline), as such, chalky or lime soil can turn the leaves of ericaceous plants yellow and may even kill them.
If you're not sure of the pH (acidity or alkalinity) of your soil, it may be worth purchasing a Soil Testing Kit to accurately asses your soil.