For a more colorful look or a smaller garden, use low-growing flowers such as dwarf irises, daffodils, tulips, or lush lavenders to edge your beds. Outside of the basic four-square structure, there are eally no rules to this type of garden. Use herbs for edging, as fillers, or as accent plants. Plant creeping thyme along walkways, where it can spill out underfoot and release wonderful fragrance when stepped upon. Shrubby herbs like rosemary or sage create low, continuous borders if they are kept neatly trimmed.
Fruit trees are also essential for a complete kitchen garden.
Of all the plants in the kitchen garden, they embrace the broadest range of seasons with displays of flowers, fruits, leaf color, and branch patterns. Don't plant fruit trees throughout the garden, though, unless you can live with the resulting shade. If space is at a premium, espalier trees against a wall or a trellis or find dwarf varieties. Vines are another feature in traditional four-square gardens. They give a garden a lived-in look, softening architecture and taking floral color to new heights.