Summer students from Victoria University of Wellington have been helping the Innermost community gardens in Wellington put numbers on their social and environmental values.

Research shows that community gardens provide more than just silverbeet and beans - they promote a sense of engagement and belonging in a community.

And it turns out that a good composting scheme will also attract people from the surrounding suburbs who are keen to recycle their food scraps.

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Wellington's Innermost Gardens is a large, successful community garden located next to the town belt on Mount Victoria.

It was created on the site of an old bowling green and marching lawn, using permaculture principles and raised beds.

Innermost Gardens runs regular working bees and is supported by a large number of volunteers coordinated by a core group.

It has been the subject of a recent Victoria University of Wellington summer student research project, which has helped quantify its social and environmental benefits.

Core group member Chris Montgomery says they requested the research because "we know that we're doing better for this land than if it was a marching lawn, but how do you put a dollar value on that?"

" know that we're here," says Chris, "yet on their balance sheet we're just a certain amount of income from renting the hall."

"We wanted to be able to say that while you may see us as a one line item on your balance sheet, actually we bring a whole lot more benefit to the community by just being here and doing what we do."

Architect Fabricio Chicca, from Victoria University of Wellington's Faculty of Architecture and Design Innovation, has a long-standing interest in urban agriculture and community gardens and he has supervised the summer research.

The first project, he says was carried out a few years ago for Wellington City Council. The council were interested in knowing how many community gardens there were in the city and how successful and productive they were.

The survey identified 21 gardens, which varied greatly in size and effectiveness.

Fabricio says that the greatest benefits offered by community gardens are social ones, rather than sustainable environmental ones.

Community gardens are, he says, not the most productive use of land but are appreciated for other reasons.

The most recent Victoria University of Wellington summer student was Bliss Graetz, a landscape architecture student…

Go to this episode on rnz.co.nz for more details