If a garden of formal design is desired, it should always be a complete unit, that is to say, either the whole garden should be formal, or if the garden is large enough to allow of both a formal and informal garden, they should be separated by some suitable hedge or division. This can be a low stone wall or a hedge of small trees.
An amateur will often like to specialize in a certain kind of flower, and these specialist gardens often take on a formal design. This type of garden should also be a complete unit. Unless care is taken over this point the beauty is often marred.
Before the specialist garden is decided upon and arrangements have been made, it is necessary to consider the requirements of the plants to be grown. Roses, for instance, like rich loam of stiff mixture, and not poor sandy. would grow on sandy peat, and a good heather garden could be made on thin sandy heathland.