Citizen oversight (e.g. boards, advisory)

As an open root space, climbing plants usually only need a small floor area. Such planting areas can be cut out in a semicircular shape
directly on the facade, for example in the eaves strip of the roof overhangs (irrigation may be necessary). The city department for urban development initiated a funding programme for green facades and walls on private property in the city district of Wolbeck. It formed part of the proposed measures of the urban redevelopment programme for the district to improve its attractiveness and enhance green spaces. It included the reimbursement of up to 70 per cent of the arising material costs provided that the owner commits to maintaining the green façade for ten years. Although only three parties participated in the programme, public awareness of the multiple benefits of green space were raised (ref. 1, 2, 3 and 4).

In order to improve the Indian Neighourhood, a 'ribbon' of multiple pocket parks was created that improves social cohesion and environmental quality. The area lacked social cohesion previous to the creation of the pocket parks and was faced with nuisance from addicts and drug dealers as they were involved in disturbing behaviour, vandalism and criminality (1,10). This created an unsafe environment for the inhabitants of the neighbourhood (1,5) In the stamp parks, social activities are organized and the green spaces are completely managed by citizens themselves. (1)

The green initiative 'Oost Indisch Groen' (East Indian Green) is a citizen initiative to make the neighbourhood more sustainable, fun and healthy by means of active citizenship. The key NBS initiative is the neighbourhood garden ('Buurttuin Oost Indisch Groen') in which vegetables are grown with a community kitchen that supports social cohesion and that also gives space for an educational workshop on gardening and sustainability-related topics (1, 6,7)

Community Garden Trompenburg was initiated by one citizen who mobilized his neighbours to create a garden in which organic crops can grow. The garden promotes social cohesion and equity within the neighbourhood because citizens, as well as disadvantaged groups and children, work together on the maintenance of the garden. Furthermore, sustainable food production is promoted and taught to interested parties in the form of workshops. (1,3,7)

The historical canal that was disconnected by a road in the 1970s is currently being restored by the municipality, creating a lively atmosphere allowing for water recreation, a boulevard and green spaces (ref. 1). A small element of this restoration is the addition of green elements by a citizen group, which entails improving ecological, aesthetic and historical quality of the canal by implementing eco-friendly riverbanks, green connecting zones and floating vegetation islands (ref. 3,9,11,12).

Appletree is an outdoor community resource, where people of all ages and from all walks of life, get together to grow e.g. fruit, and contribute to developing and maintaining the area. The growing space and garden are divided into different areas, offering a range of gardening experience. The community also contributes to their permaculture, wildlife and wildflower areas. The community is constantly planting and regenerating areas of the garden. (Ref. 1)

The South Saint-Jacques district is a residential area. A public housing project in the district incorporates careful landscape planning to promote social interaction, increase biodiversity, and better manage rainwater. It includes green spaces, collective area for free initiative from the community, swales and planted basins for rainwater drainage (Ref. 1).

The Garden Factory ('Tuinfabriek') is an exceptional urban agriculture project on a roof of the central station that aims at becoming the largest food-producing roof of the Netherlands. The project is a self-sustaining vegetable garden located on the roof of a busy mall in the centre of Utrecht (ref. 5). On the roof, citizens, students, company employees and schools work together to grow vegetables and keep bees and chicken. The Garden Factory reflects an ecological 'self-sustaining factory' as the chickens, worms and bees 'work' in the garden as being part of the decomposing system and pollination and a system is built for rainwater retention that allows for irrigation (ref. 1). Eating, composting, sowing, growing, harvesting, cooking form the production process of this Garden Factory (ref. 4).
The main elements of the roof garden are in place, such as the crop bins, the chicken coop and the decomposing machine are completed. However, it is an ongoing developing project as some elements are still in development stage such as some elements of the Soup Kitchen and the aim is to integrate the Garden Factory more with the central station shopping mall in multiple ways (ref. 1).

Champratel Eco-District is mainly a housing development plan with new green space areas which will be part of the green corridor of the city. "It will be a real "Garden-District" to offer participatory housing: "For La Grande Plaine, the city of Clermont-Ferrand wanted to go beyond the simple redevelopment of a neighborhood by implementing an innovative approach: participatory housing. It's a new way of collectively designing, creating and managing individual homes" (Ref. 11). It will offer harmonious urban forms and vast green spaces. It will mainly offer a concordance between two desires: the proximity of the city and a pleasant living environment" (Ref. 2). Three main green spaces have been created including a meadow in the north, a green square Rose-Parks to create a meeting place for the inhabitants, and diverse gardens (some of which are maintained and others which are wild" (Ref. 5).

The city of Clermont-Ferrand has 2 sites of family gardens, located at rue Robert Lemoy and rue du Château des Vergnes at which they have installed on a total area of 40 216 m², 172 parcels leased to, mainly, Clermontois residents in apartments without gardens. The gardens are a true place of life for gardeners where families and friends may meet and share convivial moments. Inscribed in a practice respectful of the environment, the gardeners and their cultivations turn toward a kind of agriculture that expects from each gardener an eco-responsible behavior in the production of food (Ref. 1).