Plant Feed is used by gardeners to improve plant growth and boost flowering, especially if plants are grown in pots or containers. It is not always necessary to feed plants. Plants in the ground along borders or in flower beds, may not need feeding, as they are provided with nutrients in the soil, however plants in containers or pots, will need feeding regularly, as they only have what you give them.
Ornamental Trees and Shrubs in garden soil may not need regular feeding by fertiliser. Some crops that do benefit from regular fertiliser are fruit, vegetables and bedding plants.