Humphry Repton, the leading garden theorist of the nineteenth century, defined a garden as 'a piece of ground fenced off from cattle, and appropriated to the use and pleasure or man: it is, or ought to be, cultivated and enriched by art'.

Having lasted for 4,000 years, the use of nature's materials to express ideas about nature may be expected to continue. The best garden designs are produced with an awareness of the art, science, history, geography, philosophy, social habits and construction techniques of their period.

From 50 centuries, we can learn about the close relationship between garden design and urban design, because both arts involve the composition of buildings with paving, landform, water, vegetation and climate.

The strengths landscape architecture draws from its garden design heritage include: the Vitruvian design tradition of balancing utility, firmness and beauty; use of the word 'landscape' to mean 'a good place' - as the objective of the design process; a comprehensive approach to open space planning involving city parks, greenways and nature outside towns; a planning theory about the contextualisation of development projects; the principle that development plans should be adapted to their landscape context.

The tragedy of feminine design is that it receives so little official support. Most of the world's design schools, having been organized by men, encourage a masculine approach, even when they are run by women. Yet many designers who are male in the biological sense have a feminine approach to design.

In town and in country there must be landscapes where we can walk in safety, pick fruit, cycle, work, sleep, swim, listen to the birds, bask in the sun, run through the trees and laze beside cool waters.

Many of the world's best-designed cities have been inspired by garden concepts.