Research & reports

N Fernández Salido, A Gallego Valadés, C Castells, Jordi Garcés Ferrer · European Journal of Public Health · Europe

The European U-GARDEN project evaluated the impact of urban gardens on promoting active aging through the participation of people over 65. Qualitative analysis of 20 semi-structured interviews revealed multiple benefits, including increased physical activity, psychosocial improvements such as higher personal satisfaction, reduced stress, enhanced self-esteem, and strengthened community connections. Participants also reported economic savings on food costs and increased food security.

Daniele Codato, Denis Grego, Francesca Peroni · Frontiers in Sustainable Food Systems · Italy (Padua)

This study in Padua, Italy, used field surveys of key informants and spatial multicriteria decision-making analysis to identify suitable and inclusive areas for community gardens. The results prioritized neighborhoods for new community gardens based on distance, social, and combined indices, providing a methodology to support local policymakers in implementing community gardens.

Melissa Anna Murphy, Pavel Grabalov · ˜The œGeojournal library · Europe

A study of urban agriculture initiatives in Aarhus, Denmark, and Rotterdam, the Netherlands, explored how municipalities facilitate urban agriculture and its performance in public spaces. It identified four public service trajectories: increasing access and animation, contributing to social services, producing and distributing food, and building communities. The study found that food production and social services may be little suited for urban spaces requiring high public access, although benefits can reach a broad public if localized and facilitated appropriately.

Pénélope Duval, Edwige Martin, Laurent Vallon, Pierre Antonelli, Maxime Girard, Aymeric Signoret, Patricia Luis, Danis Abrouk, Laure Wiest, Aurélie Fildier, Christelle Bonnefoy, Patrick Jame, Erik Bonjour, Amélie Cantarel, Jonathan Gervaix, Emmanuelle Vulliet, Rémy Cazabet, Guillaume Minard, Claire Valiente Moro · FEMS Microbiology Ecology · France

A study conducted in French community gardens investigated whether pollution gradients influence the water microbial composition of Aedes albopictus larval habitats. The physicochemical and microbial compositions of noncolonized and colonized waters did not significantly differ, with the exception of N2O and CH4 concentrations, which were higher in noncolonized water samples. The microbial composition of larval habitats covaried differentially along the pollution gradients according to colonization status.

Janie Bickersteth, J. F. S. Ferro, Marjorie Landels, Stephanie Robson · · United Kingdom

Incredible Edible Lambeth (IEL) is undertaking two mapping projects in Lambeth, UK, to identify and make available hidden food production niches. Six walking trails highlight existing food growing in community gardens and green spaces, distributed to pharmacies, GP surgeries, and schools. The 'Lambeth plots' project, in collaboration with Arup, combines GIS analysis with citizen-led mapping to reveal food growing potential across the entire borough.

Sabina Rossini Oliva, Rafael López Núñez · Environmental Science and Pollution Research · Spain (Andalusia)

This study evaluated potentially toxic elements (PTEs) in vegetables and topsoils from urban gardens in Seville, Cordoba, Huelva, and a mining area (Riotinto), Spain, comparing them with market and peri-urban samples. Soils in the mining area and cities generally showed higher contamination with As, Cr, Cu, Pb, and Zn compared to other locations. Despite this, all PTE concentrations in vegetables from the studied urban gardens, including those from As-contaminated soils, were below health-based guidance values and market levels (except lettuce), and human health risk assessments indicated safe consumption.

Michael Hardman, Lydia Hubbard, Hayley Watson · The Professional Geographer · United Kingdom

This article reflects on urban agriculture (UA) in the United Kingdom, focusing on its relationship with green social prescribing (GSP). It highlights the increased impact of UA schemes that adopt GSP practices. The article aims to raise awareness among key actors about opportunities and challenges, and encourage geographers to engage with GSP.

Elliot Buckminster, Charlotte Breckenridge, Thomas Sedgwick · International Journal of Research in Agronomy · United Kingdom

This research quantified soil-to-plant transfer factors for six heavy metals (Cd, Pb, Zn, Cu, Ni, Cr) in lettuce, spinach, and carrot across 20 peri-urban agricultural sites in Berkshire, UK, from 2021-2022. Cadmium exhibited the highest mean transfer factor (0.31), and at 4 of 20 sites, cadmium concentrations in lettuce exceeded the EU maximum limit of 0.20 mg/kg fresh weight. Soil pH was a strong predictor for Cd and Zn transfer factors, with TFs increasing below pH 6.0.

Buonanno Rosa · IRIS UNIMORE (University of Modena and Reggio Emilia) · Italy (Reggio Emilia)

This study in Reggio Emilia, Italy, explored primary school children's knowledge of plants and their uses, and aimed to rebuild a plant-focused learning environment with school stakeholders. Qualitative analysis of children's conversations and documentation revealed their innate connection with plants through food or health applications, supporting their "naturalistic intelligence." Teachers reported that the plant project fostered group work, collaboration, and a changing didactic approach, connecting children to the earth's environment.

Cosimo Dondini, Xavier Úbeda, Giacomo Certini, Marcos Francos · Journal of Soils and Sediments · Spain (Barcelona)

This study analyzed soils from ten urban gardens in Barcelona, Spain, with a special focus on possible contaminants. Irrigation water was also analyzed, and some of the waters contained a high concentration of salts and nitrites, which are listed as a pollutant. While three tests for heavy metals did not attest to significant pollution, other toxic elements not considered in this study could come from road transport gases or the port of Barcelona. Overall, the soil quality was concluded to be suitable for growing vegetables.

Larissa S. Drescher, Carola Grebitus · EuroChoices · Europe

This study investigated the link between growing one's own food and dietary quality, using the Healthy Food Diversity Index, Berry-Index, and a produce consumption indicator. It found that growing food at home and in community gardens is associated with the highest fruit and vegetable consumption, while not growing any food is associated with the lowest produce consumption. Overall, the results indicate that growing food is linked to higher dietary quality values, suggesting potential health benefits from home and community gardens. The negative association between not growing food and diet quality highlights a need to promote food-growing programs.

Fotini Tsofliou, R. Vijayakumaran, Ashley Wilson, Anthony Mills · Proceedings of The Nutrition Society · United Kingdom (Dorset)

This pilot research, conducted with fourteen adults in disadvantaged areas of Dorset, UK, explored perceptions on the importance and roles of community food garden and kitchen initiatives. Four main themes emerged from the participants' perspectives: tackling food insecurity and sustainability, utilization of climate-friendly and organic food, bridging the intergenerational gap, and promoting a healthy lifestyle.

Adriana Flores-Guevara, María de Lourdes Hernández- Rodríguez, María Esther Méndez- Cadena · Revista Investigium IRE Ciencias Sociales y Humanas · Spain (Madrid)

This 2018-2023 study in Madrid, Spain, investigated socio-environmental phenomena in the Community Urban Gardens Network (RedHMad) to understand how they foster sustainable neighborhood development. Researchers conducted open interviews with ten participants, performed participatory observation, and reviewed RedHMad assembly minutes. Findings indicate that community urban gardens generate social cohesion and coexistence, supporting cultural, artistic, experimental, environmental education, and health activities, and facilitating social organization when needed.

Simone Trimmel, Stefan Wagner, Laura Feiner, M. Feiner, Daniela Haluza, Rebecca Hood‐Nowotny, Ulrike Pitha, Thomas Prohaska, Markus Puschenreiter, Philipp Spörl, Andrea Watzinger, Elisabeth Ziss, Johanna Irrgeher · Environmental Science and Pollution Research · Europe

A study of urban gardens in Vienna, Austria, building on a previous study of eleven gardens in the city that found elevated lead (Pb) levels in some soil and plant samples. This work examined the elemental composition of soil and plants from two of the affected gardens one year after compost amendment. ICP-MS analysis of tomato fruit skin, pulp and seeds showed only minor variations in elemental composition unlikely to affect food safety, whereas radishes showed a tendency toward contaminant accumulation in root tips and leaves. Washing lettuce significantly reduced levels of potentially toxic elements including Be, Al, V, Ni, Ga and Tl, underscoring the importance of washing garden produce before consumption; compost amendment was associated with reduced Zn, Cd and Pb levels in radish bulbs. Lead isotope ratios in soil and spinach leaf samples from the earlier study, assessed by MC-ICP-MS, showed a direct linkage between the Pb isotopic signatures in soil and spinach leaves, supporting their use as tracers of Pb sources in the environment.

Anne-Kristin Løes, Sebastian Eiter, Tatiana Rittl · Environmental Sciences Europe · Europe

Using soil data from ten peri-urban case farms near Oslo and Bergen, Norway, this study estimated how quickly potentially toxic element (PTE) concentrations would rise in soil under intensive application of compost or digestate from food waste, composted garden waste, or horse and poultry manure applied annually to meet a theoretical carrot crop's nitrogen, phosphorus and potassium demand. Under this intensive fertilization scenario, Norwegian soil quality limits for PTEs would be reached within 20-85 years, faster in soils with more organic matter, with limits reached first for copper and zinc, both essential micronutrients. The urban waste-based fertilizers were also found to be poorly balanced in macronutrients, with rates covering potassium demand leading to high phosphorus and nitrogen surpluses. The study concludes Norway's PTE regulations are stricter than the EU's and do not support recycling organic matter and nutrients from urban waste.

Adriana Díaz Caamaño · Academia XXII · Spain

This essay frames urban food cultivation and harvesting, once a common practice around human settlements in past centuries, as a new trend for urban sustainability amid an environmental crisis driven by city growth and its planetary impact. It argues that unsustainable agriculture is straining to feed a vast population with little awareness of the countryside or of its benefits for mental and physical well-being, but presents no specific study data or case findings.

Ada Baldi, Nicolas Lucio Gallo, Anna Lenzi · Renewable Agriculture and Food Systems · Italy

Semi-structured interviews with participants in the "social gardens" of Prato, Italy — plots the municipality assigns to individual pensioners or unemployed people for growing vegetables for home consumption — examined demographic and socio-economic characteristics, cultivated crops, and plot areas. The typical gardener was male, retired, averaged 74 years old, and had a low level of education. A 50 m2 plot with 40% of its area cultivated was estimated to yield about 90 kg of vegetables per year, roughly 61.5% of one person's fruit and vegetable needs. Tomatoes occupied more than 80% of the cultivated area. Vitamin C and Vitamin A showed the highest nutrient contributions, while calcium and sodium showed the lowest.

Elżbieta Skorbiłowicz, Piotr Ofman, Mirosław Skorbiłowicz, Marcin Sidoruk, Urszula Tarasiuk · Water · Poland

This study assessed heavy metal contamination in 96 surface sediment samples collected from urban, agricultural, and forested areas of the Bug River catchment in Poland between July 2018 and 2020, measuring metals (Zn, Pb, Cr, Ni, Cu, Fe, Mn, Cd) by atomic absorption spectroscopy and applying the geoaccumulation index (Igeo), contamination factor (CF), and pollution load index (PLI). Urban sediments showed significantly higher heavy metal concentrations than agricultural or forested areas, with cadmium reaching up to 2.5 mg/kg; the average Igeo for cadmium was 0.24 in agricultural areas and 0.15 in urban areas, while the highest PLI values, reaching a maximum of 0.33, occurred in urban areas, and statistical analysis showed both urban emissions and agricultural activities significantly influenced heavy metal presence in the sediments.

UCL Institute of Education · UCL Institute of Education · United Kingdom

A UCL Institute of Education article on a partnership with the RHS training primary-education student teachers to use gardening as a teaching tool, describing an activity suitable for a class of 30 and featuring comments from participating staff.

· Local Environment · United Kingdom (Aberdeen)

Based on interviews with food-growing project participants in Aberdeen, UK, finds unexpected wellbeing effects of urban food activism, notably heavy burdens on volunteer coordinators of community gardens.

Lucile Vigouroux, Fanny Provent, Giulia Giacchè · HAL (Le Centre pour la Communication Scientifique Directe) · France

This report details the ‘Potager à la Marmite’ (PAM) experiment, conducted by LAB3S and the Urban Agriculture Chair with local partners in Bondy Nord, France. The two-year experiment (2022-2023) aimed to combine a community garden with a collective kitchen. Its goals were to provide access to healthy, sustainable food, enable inhabitants to reclaim public spaces, and observe knowledge-sharing dynamics. The abstract does not state any specific findings from the experiment.

Fürüzan Aslan, Yaşar Menteş, Oğuz ATEŞ · Kırklareli Üniversitesi Mühendislik ve Fen Bilimleri Dergisi · Turkey (Elazığ)

This study examines the city area of Elazığ province, Türkiye, from the perspective of urban agriculture, which is presented as a tool for sustainable urban development. It offers various suggestions to ensure sustainability in Elazığ, develop insights into regional food supply, and increase the importance of urban aesthetics, land use, urban environmental management, public health, and economic development.

Abigail Schoneboom, Daniel Mallo, Armelle Tardiveau · Journal of Classical Sociology · United Kingdom

This sensory ethnographic study, using pinhole photography, explored how time is experienced by unemployed volunteers at a community garden in the north-east of England. It found that the garden's ability to provide meaningful time is rooted in its food-growing and composting cycles, as well as enduring elements like mature trees and volunteer-made structures. The study argues that urban community gardens offer an "elongated present" that fulfills individuals and sustains community and nature.

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.

Angelina Sanderson Bellamy, Ella Furness, Susanna Mills, Adrian K. Clear, Samantha Mitchell Finnigan, Elliot Meador, Alice E. Milne, Ryan T. Sharp · Frontiers in Sustainable Food Systems · United Kingdom

This study analyzed interview data and food diaries from Community Supported Agriculture (CSA) members and the wider UK population, using the 2019 EAT Lancet Commission dietary guidelines. It found that CSA members consumed diets closer to the EAT Lancet recommendations than controls, with significant differences in daily intakes of meat, dairy, vegetables, legumes, and sugar. CSA members' diets emitted on average 28% less CO2 compared to controls.