For best results ensure to check the soil pH before purchasing the type of heath you wish to grow.
They do not need pruning, though to achieve best flowering and growth habit, they can be pruned annually after flowering. They prefer light pruning to encourage new growth and flowering.
For prolonged flowering best to prune them hard (for some heaths it will differ) early spring.
Avoid water logging soils as that leads to root rot leading to death of the shrubs and trees through stem and root rot can be controlled by Yates Anti Rot with improved drainage.