Research & reports

Jennifer Roedel, Karma Thomas, Zsofia Szendrei · Renewable Agriculture and Food Systems · United States

This study surveyed 74 urban growers to evaluate how grower and farm characteristics influence the implementation of eight common pollinator management strategies and overall farm crop richness. It found that demographic variables had no impact; instead, growers' decisions were shaped most by their sources of educational information and by resource use and accessibility, with online materials appearing more effective than hard-copy formats. The authors conclude that more accessible educational resources are needed for these historically underserved urban growers.

Maria Eduarda Costa Maia, Nathalia Gomes Corrêa, Eder Everton Caldas de Oliveira, Waldenira Mercedes Pereira Torres · Aracê. · Brazil

This article reports on the creation and implementation of a school garden at Dep. Abel Figueiredo Municipal Elementary School in Mocajuba, Pará, Brazil. The project, initiated based on student demands identified through a documentary, involved 9th-grade students, PIBID scholarship recipients, and the school community. The school garden fostered practical learning, student leadership, collaborative work, and improved school meals, with strategies for sustainability including maintenance schedules and irrigation systems.

Edith Gonzales, Brenda B. Lin, Heidi Liere, Shalene Jha, Stacy M. Philpott · Figshare · United States (California)

An online survey of community gardeners in California, United States, assessed their knowledge of arthropod ecological roles. Gardeners demonstrated high knowledge, correctly classifying 71–83% of arthropod images. Female gardeners more accurately classified pollinators, while those who participated in a Master Gardener program more accurately classified herbivores and natural enemies.

Vívian Ariane de Oliveira Costa, Raíssa Aline Pereira, Mariana Azevedo Rabelo, Paula Montenegro Euzébio, Angela Liberali Pinheiro, Gabriella Ribeiro · Revista Brasileira de Educação Ambiental (RevBEA) · Brazil

This article reports on a school garden implemented in Early Childhood Education at Cirandinha School, in partnership with the Poços de Caldas Botanical Garden Foundation, after in-person classes resumed post-COVID-19. Using a qualitative and descriptive approach, the experiment aimed to promote critical environmental education and healthy habits. Results indicated active participation by children, increased autonomy, and environmental awareness, showing the garden as an integrative resource linking school, family, and community.

Jesús De la Rocha Illanes · Revista de Estudios Urbanos y Territoriales IBU · Mexico (San Cristóbal de Las Casas)

A qualitative, exploratory-descriptive study was conducted on four community urban gardens in San Cristóbal de Las Casas, Chiapas, Mexico, to understand how agroecological scaling occurs and what practices comprise it. The research found that agroecological scaling in these gardens is essentially horizontal and deep, occurring at a microsocial level, person-to-person, and intergenerationally; however, the vertical facet of this process appears to be weakened. Agroecological practices include collective/collaborative composting of organic matter, ecotechnology engineering, links with local socioeconomic and solidarity networks, digital presence, reintegration of agricultural ceremonies/rituals in the urban context, and collective actions against eviction attempts.

Jéssica de Oliveira, Micael Silva de Freitas, Frederico Augusto Guimarães Guilherme, Jonathan Souza Oliveira, Laura Beatriz Oliveira, E. V. E. J. Amaral, Eder Marcos da Silva, Wendy Carniello Ferreira, Anderson Ribeiro Diniz, Carlos Rogério Andrade, Deivid Lopes Machado · Urban Ecosystems · Brazil (Jataí)

The temporal dynamics of urban greening in public squares in Jataí, Goiás state, Brazil, were evaluated through two surveys in 2010 and 2024. A complete floristic census of 14 public squares found no difference in total abundance but a significant increase in species richness from 79 to 121. However, urban greening management prioritized exotic and deciduous species, detrimentally affecting ecosystem attributes essential for sustainable planning, such as permanent shading and the valuation of regional flora.

Carlos Alberto Garza Alonso, María de Jesús Ordóñez Díaz, Flor Esthela Sánchez Cortés, José Carmen García Flores · Journal of Ethnobiology · Mexico

This study analyzed the multifunctionality of 40 community gardens in the Monterrey Metropolitan Area, Nuevo León, México, using literature review, participant observation, interviews, questionnaires, and systematic tours. It recorded 80 species, predominantly used for food and medicine, and found that people possess significant traditional ecological knowledge applied in garden management. The study concluded that community gardens positively contribute to sustainability, food production, self-consumption, and social fabric.

Alfredo Pérez Guerrero, María Josefina Jiménez-Moreno, Florentino López-Sánchez · Revista Chapingo Serie Agricultura Tropical · Mexico

This research analyzed the multifunctionality of urban and peri-urban agriculture (UPA) in Tocuila, Texcoco, Mexico, by applying the Multifunctionality Index of Agricultural Production Systems (IMSPA) to 50 agricultural systems through surveys. Indicators were weighted using the Delphi technique with experts and ejidatarios. Results showed that 50% of systems had medium-high multifunctionality (level IV), 48% had medium multifunctionality (level III), and only 2% had high multifunctionality (level V). The majority of agricultural systems exhibited an intermediate level of multifunctionality, with relevant but limited capacities to generate simultaneous benefits across productive, environmental, and social dimensions.

Catherine Bukowski, Kate MacFarland, Katherine Favor · · United States

This Agroforestry Note describes urban and community food forests and edible forest gardens in the United States, which integrate trees, shrubs, and perennial plants with community-driven design. These systems, rooted in traditional ecological knowledge, are found in public parks, vacant lots, and other public-facing spaces, including privately held properties open to the public. They are designed to maximize resources and address community needs, creating ecologically productive and socially engaging spaces.

Isaiah Sawyer, Reginald Andre, Yotam Shanun, Brendan Casal · Journal of International Crisis and Risk Communication Research · United States

This project, in partnership with the UCF Arboretum in the United States, involved activities such as clearing invasive vines, weeding and remulching beds in a community garden, and documenting local biodiversity across campus areas. Participants documented their service work through a culture audit to analyze the project's impact and leadership strategies. These activities contributed to building leadership skills, analytical tools, and a deeper sense of ownership over the campus's natural beauty.

Larisa Alonso Moreno, Cristian Lizarazo-Ortega, Guadalupe Rodríguez Castillejos · Bioagro · Mexico

This study aimed to characterize the bacteriome of four different substrates used in urban gardens: peat, black soil (nursery), agricultural soil (northern Tamaulipas, Mexico), and a mix of agricultural soil with vermicompost and mycorrhizae. Genomic DNA was extracted and the 16S region amplified for analysis. The most prevalent phyla were actinobacteria, proteobacteria, and firmicutes, with dominant genera including Bacillus, Solirubrobacter, Rubrobacter, and Streptomyces, all linked to crop benefits.

Joshua Garcia, Mariel Mondragon-Becerra, Ivan Moya martinez, Connie Tsz Fai Wong, Zoe Caron, Katherine Kravitz, Elaine Owyang, Olukayode Jegede, Rebecca Ryals, Cristina Lazcano · Discover Sustainability · United States

A 2026 study conducted with Local Ecology and Agriculture Fremont (LEAF), a small urban farm in the San Francisco Bay Area, US, tests whether regenerative agriculture can support soil health and biodiversity in an urban landscape, comparing uncultivated soils, soils managed regeneratively for four years (Regen.4), and soils managed regeneratively for 10 years (Regen.10). Soil chemical properties such as pH, electrical conductivity, and lead concentration differed significantly between plots, likely reflecting each plot's management and land-use history. While total soil carbon did not differ between plots, Regen.4 had a higher proportion of labile carbon than the uncultivated plot along with a greater abundance of soil microorganisms and nematodes, and Regen.4 soils also showed improved physical properties — higher aggregate stability and lower compaction — compared with both the uncultivated plot and the Regen.10 plot.

Subin Babu Neupane, Pedro F S Toledo, Katerina Velasco-Graham, Felipe N. Soto‐Adames, Arash Kheirodin · Journal of Integrated Pest Management · United States

This is the first report documenting the invasive thrips species Thrips parvispinus, native to Southeast Asia, in Texas, USA. Samples collected from 12 locations across Texas -- including greenhouse facilities, large retail outlets and community gardens -- from plants showing foliage injury confirmed the species' presence in November 2025, and detections across multiple counties suggest it has been introduced to multiple locations and may be widely distributed in the state.

Mary T Nguyen, Carleen Rauh, Shelby Gresch, Charlotte Correiro, Heidi Elmendorf, Adriane Fugh-Berman, Gina Wimp, Alexandra L. DeCandia · ODU Digital Commons (Old Dominion University) · United States

Plant, animal, bacterial and fungal diversity were examined across three distinct urban habitats — a turf lawn, a forb garden and a farming space — using bacterial 16S rRNA and fungal ITS2 sequencing, soil nutrient analyses, and vegetation and wildlife surveys. Bacterial community abundance was relatively even across garden types, but site-specific management style significantly shaped which fungal taxa dominated: Leotiomycetes in the farming space, Sordariomycetes in the forb garden, and Tremellomycetes in the turf lawn, indicating that distinct urban agricultural practices strongly shape fungal communities. Gardens with greater plant diversity also supported higher wildlife and fungal richness.

United States Environmental Protection Agency · US Environmental Protection Agency (EPA) · United States

The EPA's Soak Up the Rain page states that green roofs can significantly reduce the amount of rainwater that would otherwise run off an impervious roof surface, and can also help reduce building energy usage and noise while increasing roof durability and lifespan compared to conventional roofs. It explicitly notes that structures must be able to support the loading of green roof materials under fully saturated conditions.

· Wikipedia · United States

This Wikipedia article covers the Beacon Food Forest, an urban food forest on public land in Seattle's Beacon Hill neighborhood, described as the largest food forest on public land in the United States. Jacqueline Cramer and Glenn Herlihy proposed the concept in 2009; the project received a $20,000 grant in 2010 and a $100,000 development grant in December 2011, with initial planting of 1.75 acres in September 2012. It added 27 P-Patch garden plots in 2014, expanded by 1.5 acres in 2019, and its Food Forest Collective gained nonprofit status in August 2017.

U.S. Environmental Protection Agency (EPA) · U.S. Environmental Protection Agency (EPA) · United States

This official U.S. EPA page on 'The Effects' of nutrient pollution explains that excess nitrogen and phosphorus entering air and water cause algal blooms, degrading water quality and reducing dissolved oxygen. It states cyanobacteria can release toxins that sicken people and animals via contact, drinking water, or contaminated seafood, that nitrates in drinking water pose risks to infants, and that excess airborne nitrogen contributes to ammonia and ozone formation. The page itself contains no specific numeric statistics on economic damages or dead-zone area.

· Wikipedia · United States

A bioswale is a vegetated drainage channel that captures and breaks down sediment, organic matter, pathogens, nutrients, and heavy metals from stormwater runoff via plants and soil. At Willamette River Park in Portland (1996), 2,330 lineal feet of bioswale reduced suspended solids entering the river by 50%, and New York City has built more than 11,000 curbside bioswales.

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.

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.

· 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.

Sergio Osorio Cañadas, Ek del Val de Gortari · Dialnet (Universidad de la Rioja) · Mexico (Morelia)

This study investigated pollinators in seven urban and periurban orchards in Morelia, Mexico, during an annual agricultural cycle from October 2022 to June 2023. Monthly 5-hour censuses at each site revealed a considerable diversity of pollinators, with an average of 60 different species including bees, wasps, flies, butterflies, beetles, and hummingbirds, visiting the orchard flowers. It was also observed that each plant species attracted different pollinators.

Sara Perl Egendorf, Maha Deeb, Brooke Singer, Nkwi Flores, Marisa Prefer, Zhongqi Cheng, Peter M. Groffman · Geoderma · United States (New York City)

The Carbon Sponge pilot study, conducted at the New York Hall of Science in Queens, New York City, evaluated the effects of different plant communities on constructed Technosol formation and carbon and nitrogen cycling through an artist-led collaboration. Soils were constructed from NYC Clean Soil Bank sediments and urban municipal composts at a 2:1 ratio, creating 24 beds under 8 different planting regimes. Over the 21-month study duration, soils changed significantly in microbial biomass nitrogen content, sunflowers increased soil carbon and ammonium, and cover crop mixtures increased nitrate and ammonium.