Research & reports

Kinga Kimic, Magdalena Błaszczyk · Sustainability · Poland (Warsaw)

This study identified and assessed vegetable cultivation projects submitted to the Warsaw Participatory Budget (WPB) between 2015 and 2023. The research classified projects into six types and evaluated them across social, functional, ecological, and economic dimensions. The results showed that vegetable-related projects in the WPB were decidedly niche, with only 101 initiatives submitted and 31 implemented, primarily focusing on education for children rather than direct food access.

Evangelista et al. · Agronomy for Sustainable Development · Europe

This 8-year case study tracked tomato cultivation in a rooftop greenhouse. Peak yield reached 49 g plant−1 day−1 in the 2023 cycle, but overall yield declined by 31.2% across the 8 years. Best water use efficiency reached 36.8 g/L under reduced irrigation. Solar transmittance dropped from 50.9% in 2015 to 46.4% in 2023 due to polycarbonate degradation, and life-cycle global warming impact rose from a minimum of 0.54 kg CO2eq to 0.94 kg CO2eq in 2023.

Juan Diego Torres, Sara R. Jaeger, Patricia Puerta, Amparo Tárrega · Applied Food Research · Spain

This study investigated Spanish consumers' perceptions of five lettuce cultivation systems using explicit and implicit methods with 105 participants. Local/small agriculture was most favorably regarded, while urban community gardens were perceived as less safe for lettuce production. High-tech greenhouses were considered safer but less sustainable, and vertical indoor farming elicited a surprise reaction due to low familiarity.

Silvio Caputo, Victoria Schoen, Chris Blythe · Land · United Kingdom (London)

Data was collected from seven community gardens and one community farm in London, UK, during the 2019 and 2020 growing seasons using a citizen science approach, investigating crop yield, resource inputs, and social benefits. Results showed very mixed levels of crop and social productivity depending on organizational structure and agenda, with no clear pattern emerging. This study suggests that citywide productivity evaluations based on small data samples may not be reliable.

Davide Marino, Francesca Curcio, Francesca Benedetta Felici, Giampiero Mazzocchi · Land · Italy (Rome)

This paper proposes agroecological assessment as a tool for formulating evidence-based local food policies, adapting the Tool for Agroecology Performance Evaluation (TAPE) model on a sample of 20 farms in the city-region food system of Rome, Italy. Data analysis showed that agroecological principles are not fully adopted by the majority of farms considered in Rome. Additionally, farms with the highest agroecological level are mainly driven by social factors and have a lower propensity for innovation, which could hinder the transformation process of food systems.

Susana Toboso‐Chavero, Cristina Madrid‐López, Xavier Gabarrell, Gara Villalba · Environmental Research Communications · Spain (Barcelona)

Implementation strategies for food-energy-water production systems on urban rooftops were evaluated in a typical housing estate in the Metropolitan Area of Barcelona, comprising 201 buildings and 13,466 inhabitants. Residents tended to choose strategies providing energy and water over the food production potential of rooftops. However, environmental assessment indicated that vegetable production alternatives were the least impactful, meeting 42-56% of residents' fresh produce demand and reducing environmental impacts by 24-37 kg CO2 eq m-2 per rooftop per year. This suggests residents were primarily concerned with energy expenses rather than food insecurity or social cohesion.

Sam Ramsden · Voluntary Sector Review · United Kingdom

This article explored an externally funded charity-led project in a deprived area of the UK, implementing urban agriculture, community gardening, and household energy activities. The project successfully engaged marginalized people, who strongly voiced outcomes including reduced isolation, improved mental health, and increased resilience and self-reliance. Environmental outcomes were less tangible but included improvements to the local environment and reduced energy usage. However, after the funding finished, marginalized participants were vulnerable to outcomes not being sustained in the long term.

Barbara Maćkiewicz, Raúl Puente Asuero, Antonio Garrido Almonacid · Quaestiones Geographicae · Spain

This study investigated how urban allotment gardens in Baeza, Andalusia, Spain, affect the city’s sustainable development. The research showed that allotment gardens in Baeza endorsed all three pillars of sustainable city development: ecological, economic, and social. However, it was found that developing broader community relations on the city scale, reviving the declining local grocery market, and disseminating environmental initiatives that allotment gardens could promote and facilitate were missing.

Giuseppe Pulighe, Flavio Lupia · Sustainability · Italy (Milan)

A spatiotemporal quantification of urban agriculture in Milan, Italy, assessed its food self-provisioning potential using Google Earth images from 2007 and 2014. The study found that even in the best-case scenario, the current urban agriculture production (98 ha of vegetable gardens, 2539 ha of arable land) is insufficient to meet the vegetable and cereal consumption needs of over 1.3 million city residents. It could only satisfy approximately 63,700 vegetable consumers and 321,000 cereal consumers.

St Clair, Rebecca, Hardman, Michael, Adams, David, Armitage, Richard, Barry, Veronica, Larkham, Peter, Sherriff, Graeme · Research Explorer (The University of Manchester) · United Kingdom

This paper reviews the diversity of urban agriculture (UA) activities in England, from small-scale guerrilla gardening to large community projects. It suggests that UA is under-theorized, with previous research focusing on practicalities and activism. The paper highlights UA's problematic contribution to food production and warns of the 'local trap'.

Alan Hallsworth, Alfred Wong · International journal on food system dynamics · United Kingdom (Portsmouth)

This empirical case study examined the potential for urban gardening to contribute to individual food security. Focusing on Portsmouth, England, the study found that prevailing economic and social structures hamper the likelihood that urban gardening can offer much greater food security. Realistically, contemporary urban gardening most closely resembles a middle-class pursuit for personal enjoyment, rather than a significant contributor to food security.

E.J. Veen, P.H.M. Derkzen, A.J. de Visser · Food and Foodways · Netherlands

This article compares food acquisition habits among participants in four Dutch urban food-growing initiatives: two allotments and two Alternative Food Networks (AFNs). Allotment gardeners integrate gardening into daily routines and easily use harvests, while AFN members, who primarily engage in shopping, struggle to regularly consume urban-grown food due to competition with supermarkets. The study concludes that involvement in shopping versus growing significantly impacts urban-grown food consumption, indicating a limited effect of motivations to change the food system when confronted with everyday routines.

Les Levidow, Katerina Psarikidou · · United Kingdom

In Manchester, England, environmental and health issues have been folded into a wider agro-food strategy aimed at making the city "more sustainable." With support from state bodies and charities, several initiatives have expanded access to fresh, healthy food, particularly in "food deserts," mobilizing resources, skills, and voluntary labor through "community engagement" to create "community spaces" for social inclusion. Manchester's agro-food networks shorten supply chains by linking peri-urban agriculture more directly with urban consumers and by promoting urban agriculture grounded in local resource mobilization and personal trust, offering an alternative to conventional agro-food chains; food relocalisation is described as helping overcome socio-economic inequalities and health problems, with Manchester initiatives cooperating to build environmentally sustainable, socially just, healthy communities and reconstructing local identities and social commitments, within a national policy context that advocates food relocalisation but provides little actual support. Despite that activity, the larger food system in Manchester remains dominated by conventional agro-food chains, and community food initiatives play only a marginal role, leading practitioners to discuss how to overcome these limitations; from 2010 onward, the UK government's austerity regime is described as undermining state support further, making community engagement even more important for mobilizing resources.