Research & reports

Jeong D., Li L., Perez-Quesada G. · Choices Magazine (Agricultural & Applied Economics Association), 2nd Quarter 2026 · United States

An analysis of community garden siting through an environmental cost-benefit framework, organised around two direct costs (land and water) and two externalities (water pollution and gentrification). Cheap vacant parcels can carry remediation and infrastructure costs that exceed those of pricier development-ready sites over a garden's planning horizon, and in arid regions irrigation can be up to 34% of annual maintenance cost. On the externality side, weak nutrient management lets nitrogen and phosphorus accumulate and risk groundwater contamination, and community gardens can raise adjacent property values by 3–4% initially and around 7% within five years, potentially displacing the lower-income residents they are meant to serve. The authors note that the absence of a comprehensive geo-referenced inventory of community gardens — with establishment dates, tenure arrangements and management practices — constrains rigorous cost quantification and causal analysis.

Zhao H., Wardropper C.B., Cao H., Campbell C.G., Chang N.-B., Qiu J. · npj Urban Sustainability · United States (South Florida)

A University of Florida (UF/IFAS) study of where public support for urban agriculture actually comes from, combining a survey of 1,000 adults across Miami-Dade, Broward and Palm Beach counties (in English and Spanish) with AI-assisted analysis of thousands of US news stories over the past decade. Support is not monolithic: different behaviours have different drivers. A sense of community connection predicts financial donations; hands-on gardening experience predicts volunteering; a sense of shared responsibility predicts buying local produce and backing policy. News interest has risen especially since COVID-19, and is strongest in Florida and West Coast states. The authors conclude that outreach tailored to the specific behaviour being sought works better than one uniform message.

FOVIDA - Fomento de la Vida · FOVIDA (Fomento de la Vida) · Peru

Peruvian NGO FOVIDA (Fomento de la Vida) reported on 11 May 2026 on an award ceremony held 30 April 2026 in Lima Sur (Villa María del Triunfo, Villa El Salvador and San Juan de Miraflores), where more than 30 urban agriculture experiences were recognized through a photo and video contest highlighting home, school and community gardens' contributions to food security and climate resilience. Winner Victoria Arce Arguedas stated that "90% of those of us who participate in the gardens are women," while fellow winner Odilia Delgado said gardening has been a major boost to the mental health of older adults like herself.

Chen H., Wang H., Bora F., Hu Y. · Cities 166:106226 · United States

Analyzes 1,874 community gardens across 24 US cities. Neighborhood race and poverty predict garden presence, but most gardens lie outside designated food deserts, limiting their capacity to address food access gaps.

Domanus A., Smith A., Roberts M., Schnorenberg R., Doane M., Minor E. · Cities and the Environment (CATE), 17(2):9 · United States (Chicago)

A study of 24 community gardens in Chicago measuring not only cultivated crops but also spontaneous (wild/native) plants, birds, butterflies and bees. Gardens supported many spontaneous plant species (mean 8.4 per garden) alongside crops, which underpinned diverse fauna (18 bird species, 13 bee genera, 10 lepidopteran species). Socio-ecological drivers such as management type (allotment vs. communal) significantly shaped cultivated richness, the volume of spontaneous vegetation, and tree/shrub density — showing that how gardens are managed governs urban biodiversity.

Roedel J., Szendrei Z. · Urban Ecosystems · North America (urban-suburban gradient)

2025 research showing that squash bees are most abundant on suburban and urban farms compared to rural farms. Demonstrates that small-scale urban farms benefit from urban environment advantages (lower pesticide use, diverse floral resources, landscape heterogeneity), enabling bee and floral community responses to urbanization.

Campbell C., Gusto C., Kelsey K.D., Haase H., Cohen N., Robertson K., Kiker G., Boz Z. · Journal of Agriculture, Food Systems, and Community Development, 14(2):9-26 · United States

A study in which 107 participants in a municipal community compost program in Gainesville, Florida, used a citizen-science approach to measure and record their household food waste for two weeks. Participants generated more than double the EPA's estimate (about 14 lb/week), yet 85.8% reported increased food-waste awareness and 71.5% reported reducing their waste, showing that community composting can nudge household food-loss reduction.

Soumya Keefe, Jean Lee · Frontiers in Sustainable Food Systems · United States (Washington)

Using an urban agriculture farmer-training program in Washington, United States, this case study examines how such programs support sustainability transitions in the food system, applying the multi-level perspective and social practice theory. It finds the program creates a space for social learning and shifts graduates' collective practices and narratives, but their capacity to change the broader food regime is curtailed without intentional state and local policy support.

Kristida Chhour, Maya Carrasquillo · Frontiers in Sustainable Food Systems · United States (San Francisco East Bay)

This mixed-methods case study of the water-scarce San Francisco East Bay maps 91 urban agriculture sites, interviews 34 stakeholders, and analyzes regional plans to examine water management and urban agriculture's resilience potential. It finds growers were the main water managers while municipalities and utilities were minimally involved, that land access shaped water access, and that institutional support to stabilize long-term land and water access is needed for greater water and food-system resilience.

Ashley Gripper, Tori Cowger · Journal of Agriculture, Food Systems, and Community Development · United States

Using exploratory factor analysis on 363 respondents recruited from U.S.-based agricultural networks, this study developed a survey-based scale to capture what Black- and Brown-led food justice organizations value most about community farming and gardening. The analysis supported a five-factor structure—termed "Agricultural Community Power" (AgCPS), covering collective self-determination, community care, land-based spiritual wellbeing, embodied Earth care, and Ubuntu/interdependence—with adequate reliability (Cronbach's alpha = 0.93).

Emory Walker, Mara Welty, Emma Creviston, Jacob J. Adler · Urban Agriculture & Regional Food Systems · United States (Lafayette)

This project examined how straw cover affects the soil microbiome of a community garden, using EcoPlate carbon-source utilization analysis and 16S rRNA sequencing on samples from the Erie Street GrowLocal community garden in Lafayette, Indiana. Straw cover increased soil moisture content and significantly increased bacterial alpha diversity, with a shift toward carbohydrate preference, though beta diversity showed no difference between conditions. The authors conclude that straw coverage can improve soil microbial biodiversity and moisture, potentially benefiting yields and food quality for communities.

Azucena Lucatero, Madeleine Fairbairn · Agriculture and Human Values · United States (California)

Using a photovoice project and semi-structured interviews with community gardeners on California's central coast, this study investigates the values that drive community garden aesthetics. It finds that "tidiness" remains the hegemonic aesthetic, upheld by formal and informal governance and personal taste, while an alternative aesthetic the authors term "wildness" offers an ecologically valuable counterpoint—though tidiness and a sustainability orientation are not necessarily mutually exclusive.

Estenia Ortiz, Adriana Mayr Mejia, Emma Borely, Liam Schauer, Lena Young Green, Maya Trotz · Sustainability · United States (Tampa)

Motivated by a community's desire to co-locate community gardens with stormwater pond spaces, this study monitored water quality of a 23.4-hectare stormwater detention pond in East Tampa, Florida over one year and compared it to US EPA reuse recommendations and water quality criteria. pH and conductivity were acceptable for irrigating crops and heavy metals were below maximum reuse levels, but E. coli concentrations exceeded irrigation requirements and synthetic organic compounds exceeded human health criteria.

Imani Canton, Vanesu Jakachira, Dawn Blackman, Heather Rose, Susan Aguiñaga · Health Promotion Perspectives · United States (Champaign, Illinois)

This 8-week pre-post feasibility study tested a culturally tailored community gardening intervention—embedding Black History Knowledge—among 11 middle-aged African American women in Champaign, Illinois, in summer 2023. Participants significantly increased device-measured daily step count (median +880 steps/day) and fruit and vegetable consumption (median +82 units), with smaller effects on physical activity and perceived stress. The authors conclude the intervention may be a feasible way to improve physical activity, produce intake, and psychological health, though larger, adequately powered studies are needed.

Brooks O., Thanganathan R., Gittings L. · PLOS One · London, Ontario, Canada

A qualitative study of a Canadian campus community garden found four themes among staff, students, and faculty: the garden as a 'third place', connection to nature, empowerment through growing food, and community building.

· BMC Public Health · Canada (Alberta)

Examines how collective community gardening addresses cultural food insecurity and supports the social integration of African immigrants in Alberta, Canada.

Emily Frankel, Lindsay Wilkinson, Christopher Kelly · Innovation in Aging · North America

Qualitative study comparing nutrition and food security experiences of elderly in rural vs. urban Nebraska communities. Rural seniors face greater barriers to healthy food access and transportation.

· Urban Agriculture & Regional Food Systems · Brazil (Sao Paulo)

Analyzes food diversity and environmental aspects of home and community gardens in highly urbanized areas of the Sao Paulo megacity.

Leanne Idzerda, Calin Lazarescu, Tricia Corrin, Eric Vallières, Alix Couture, Sara Khan, Lynn McIntyre, Valerie Tarasuk, Alejandra Jaramillo Garcia · Health Promotion and Chronic Disease Prevention in Canada · Canada

A systematic review (PROSPERO CRD42021254450) searching four databases to 19 February 2025, with duplicate independent screening, risk-of-bias assessment and certainty grading, on food-based interventions that could reduce household food insecurity (HFI) in Canada. Exposure to food voucher programmes may reduce HFI, but exposure to food box, community gardening, school food, hunting and fishing, and food charity programmes may have little to no effect on HFI. The authors conclude that because HFI is primarily an economic problem, food-based responses are unlikely to have a major impact on overall HFI and a more comprehensive public policy approach is required. This is direct counter-evidence to framing community gardens as a food-insecurity intervention.

Leialoha Ka'ula, Nicole Lee Kamakahiolani Ellison, Constance James, Ashley Oshiro, Kacyn Ideue, Kahoku Ka'ula, Alexandra Malia Jackson · Frontiers in Public Health · United States

An explanatory mixed-methods study using community-based participatory research and an Indigenous evaluation approach, examining a māla kalo (a community garden growing taro) run by Native Hawaiians living in the continental United States. At the end of the 2023 growing season, 12 volunteers and 5 programme leaders aged 18–75 completed a survey and interview. Satisfaction was high and participants wanted to take part more often; thematic analysis identified connection to self, community and land, learning and sharing knowledge, and connection to culture. With only 17 participants and no health outcome measures, the study cannot establish health effects — it documents how a community garden growing a traditional staple can serve as a site of cultural connection for a displaced Indigenous community.

Kaitlyn M. Fruin, Elizabeth L. Tung, Jean M. Franczyk, Ketaurah James, Andrew J. Koetz, Angela K. Mason, Wayne M. Detmer · Health Affairs · United States (Chicago)

An evaluation of VeggieRx, a produce prescription programme anchored to the Farm on Ogden — a 20,000-square-foot urban agriculture facility opened in 2016 in a historically disinvested food desert in Chicago, Illinois, by the Chicago Botanic Garden together with Lawndale Christian Health Center. Clinicians refer patients to the farm for free produce boxes, nutrition counselling and cooking classes. Using a retrospective, propensity-score-weighted cohort design covering January 2016 to December 2021, the study compared 680 VeggieRx participants with 978 weighted controls and found a mean body weight difference of −6.71 pounds (−4.7% of body weight) at eighteen months. Because the design is observational rather than randomised, residual confounding such as selection by motivation cannot be excluded.

Leonardo Ferreira da Silva, Maria Laura Fogaça Zei, Juliana Alcantara Fernandes, João Moreirão, Fernando Camilher Almeida · Dialnet (Universidad de la Rioja) · Brazil

This article presents the Vila dos Heróis reurbanization project in Brazil as an integrated urban intervention model for informal settlements, based on a qualitative case study. The project includes 84 housing units with sustainable infrastructure such as a floodable park, photovoltaic energy, water reuse, composting, and a community garden. The proposal demonstrates the viability of reurbanization models that integrate qualified technical planning, community leadership, and socio-environmental sustainability.

William D. Schanbacher, Dhalia Bumbaca, Luciana Jones, Ana Vidal, Christiane Barros-Adwell, A. N. Olivieri, Jennifer Kue · Journal of Agriculture Food Systems and Community Development · United States (Tampa, Florida)

This study reflects on the collaboration between a university and community partners in Tampa, Florida, to develop a community-based food sovereignty assessment and toolkit for two underserved, food-insecure communities. Using community-based research methods, the project explored how to develop and deploy the concept of food sovereignty in an urban environment, identified gaps in urban agriculture education, and ultimately led to the creation of a food sovereignty toolkit.

Christina Frendo · Urban Geography · Canada (Montréal)

This study analyzed how urban agriculture contributes to green gentrification in Montréal. Based on interviews with planners, developers, and community actors, and discourse analysis of municipal policy documents, it showed that ecological initiatives are prioritized over housing, and sustainability fixes reconcile progressive rhetoric with growth imperatives, leading to policy trade-offs that undermine housing affordability. These findings reveal how progressive governments reproduce structural injustices through their ecological transition agendas within the context of a housing crisis.

Marisol Silva-Vera, María de Jesús Jiménez González, Laura Varela Almanza · JÓVENES EN LA CIENCIA · Mexico

A quasi-experimental study in Mexico with 21 adults over 65 evaluated a community urban garden intervention for nutritional status. Participants showed increased nutrition knowledge, a 47.7% rise in vegetable intake, and a 23.8% increase in physical activity. However, anthropometric variables did not show significant differences, indicating limited impact on physical measurements despite positive changes in knowledge and habits.