The cottage garden is a distinct style of garden that uses an informal design, traditional materials, dense plantings, and a mixture of ornamental and edible plants. English in origin, the cottage garden depends on grace and charm rather than grandeur and formal structure. Homely and functional gardens connected to working-class cottages go back several centuries, but their reinvention in stylized versions grew in 1870s England, in reaction to the more structured and rigorously maintained English estate gardens that used formal designs and mass plantings of brilliant greenhouse annuals.[1]

The earliest cottage gardens were more practical than their modern descendants  with an emphasis on vegetables and herbs, along with some fruit trees, perhaps a beehive, and even livestock. Flowers were used to fill any spaces in between. Over time, flowers became more dominant.[2] The traditional cottage garden was usually enclosed, perhaps with a rose-bowered gateway. Flowers common to early cottage gardens included hollyhocks, pansies and delphinium, all three essentially nineteenth-century flowers. Others were the old-fashioned roses that bloomed once a year with rich scents, simple flowers like daisies, and flowering herbs. A well-tended topiary of traditional form, perhaps a cone-shape in tiers, or a conventionalised peacock, would be part of the repertory, to which the leisured creators of "cottage gardens" would add a sun-dial, crazy paving on paths with thyme in the interstices, and a rustic seat, generally missing in the earlier cottage gardens. Over time, even large estate gardens had sections they called "cottage gardens".

Modern-day cottage gardens include countless regional and personal variations of the more traditional English cottage garden,[3] and embrace plant materials, such as ornamental grasses or native plants, that were never seen in the rural gardens of cottagers. Traditional roses, with their full fragrance and lush foliage, continue to be a cottage garden mainstay  along with modern disease-resistant varieties that keep the traditional attributes. Informal climbing plants, whether traditional or modern hybrids, are also a common cottage garden plant. Self-sowing annuals and freely spreading perennials continue to find a place in the modern cottage garden, just as they did in the traditional cottager's garden.

Here is a link that might be useful: Cottage Garden