Tomorrow I'm meeting with Christchurch's city arborist. We're going to discuss the role the urban forest can play in the health & well being of a redeveloped Christchurch. In the UK GPs are already prescribing a 'green' treatment for early stage depression, whereby people are given a prescription not for expensive medication but for a walk in a forest for 20 minutes, 3 times a week.

Landscape architecture has an important role to play in the sustainable design of the city. Sensory gardens are those gardens that are designed to stimulate the senses, to do more than just look good, but to function on a human scale, providing food, shelter, habitat and employment. Urban forests can be the ultimate sensory garden, when planted with mixed natives, fruit and nut trees, and designed for year round interest, to attract native birds and invertebrates.

Urban trees represent an irreplaceable asset for cities, and unlike most municipal infrastructure a trees’ value will increase over its life span. In technical terms, an urban forest refers to the trees located within a city’s limits, whether planted or naturally occurring.

Check out the link to the Danish Architecture Centre's article on Edmonton's trees.

As much as being stuck in depressing places and losing your way can diminish healthcare objectives, so can the wrong type of green spaces.

Over the last 50 years or so, shopping centres and office lobbies have demeaned the value of natural features with their plastic plants and feeble fountains. Such token greenery has rendered nature invisible - a virtual green wallpaper we no longer see, or benefit from.

A study by Massey University found that to be effective in reducing stress and countering depression / improving mood in hospital, retail and office based settings, greenery needs to be real and it needs to be placed sympathetically. " "Street" style navigation is logical, allowing services to be grouped together, with access and waiting areas pleasantly defined by greenery.