Research & reports

· Wikipedia · Global

A Wikipedia article on 'victory gardens' — vegetable, fruit, and herb gardens planted at homes and in public parks during World War I and II to supplement food rations and boost civilian morale. In the US during WWI, over 5 million gardens were established, with produce valued at more than $1.2 billion by war's end. In WWII, the US had 18 million victory gardens by May 1943 (12 million urban, 6 million farm-based), accounting for about one-third of US vegetable production; in 1944, 9-10 million short tons were harvested, matching total commercial fresh-vegetable production. In Britain, allotments roughly doubled to about 1.4 million by 1943.

· Wikipedia · United States

A Wikipedia article surveying the history and present state of community gardening in the United States. It traces early examples such as the Moravians' garden in Bethabara, North Carolina in the early 1700s, Detroit's municipally sponsored 'Pingree's Potato Patches' of the 1890s, World War I/II victory gardens, and the founding of the American Community Gardening Association (ACGA) in 1978. Current figures cited include over 3,000 gardens statewide in New York, over 550 gardens on New York City property (plus 745 school gardens), about 1,400 gardens in Detroit, over 800 documented in Chicago, about 180 in Boston, and Seattle's P-Patch program with 1,900 plots across 68 locations totaling 23 acres.

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

EPA's Brownfields and Land Revitalization program page describes grants and technical assistance for assessing, cleaning up, and reusing contaminated land. As of June 2026 it lists $270 million in brownfield grants and a $1.5 billion investment under the Infrastructure Investment and Jobs Act. The page does not directly discuss urban agriculture.

City of Seattle, Department of Neighborhoods · Seattle Department of Neighborhoods · United States

The official page for Seattle's P-Patch Community Gardening Program, run by the city's Department of Neighborhoods. It describes 91 P-Patch community gardens distributed throughout the city where residents grow organic vegetables, flowers, and herbs in shared plots that also serve as community gathering and learning spaces.

Keep Growing Detroit · Keep Growing Detroit · United States

The official site of Keep Growing Detroit, an urban agriculture organization aiming for food sovereignty in which most fruits and vegetables consumed by Detroiters are grown within the city. It runs the Garden Resource Program, education series on topics like beekeeping and carpentry, and an online farm store, Grown in Detroit.

Sole Food Street Farms · Sole Food Street Farms · Canada

Founded in 2009, Sole Food Street Farms is a social enterprise that converts vacant lots into productive farmland around Vancouver's Downtown Eastside. It trains and employs residents facing complex barriers, selling and donating fresh produce.

Black Creek Community Farm · Black Creek Community Farm · Canada

An 8-acre urban agriculture centre in Toronto's Jane and Finch neighbourhood. In 2024 it harvested 31,046 pounds across 49 crops and 115 varieties, engaged 7,500 program participants, donated 3,066 pounds of food to food banks, held over 200 workshops, and provided over 60 youth employment opportunities.

· Wikipedia · India

This Wikipedia article gives an overview of Indian agriculture. It states that agriculture employs more than 50% of India's workforce and contributes 20.2% to GDP per the 2020–21 Economic Survey, while productivity remains 30–60% of that in developed countries. The article does not specifically address urban farming, focusing instead on structural issues such as infrastructure gaps and farmer suicides.

· Wikipedia · Indonesia

Indonesian politician Ridwan Kamil (born 1971) served as mayor of Bandung from 2013 to 2018. Before becoming mayor, he was a pioneer of the 'Indonesia Berkebun' (Gardening Indonesia) urban farming movement, which had grown to 14 cities with about 4,000 members by 2011. As mayor, he also worked pro bono on creating public open spaces in crowded residential areas of Bandung.

· Wikipedia · Taiwan

The Wikipedia article 'Agriculture in Taiwan' summarizes Taiwan's agricultural sector. As of 2023, agriculture accounts for 1.51% of GDP with an output value of roughly NT$35.1 billion; there were about 760,000 farm households in 2022, and food self-sufficiency stood at 35% in 2020. The article notes Taiwan's growing vertical farming sector, including iFarm in Taoyuan, described as Asia's largest vertical farm as of 2018.

· Wikipedia · Taiwan

The Wikipedia article on Taiwan's Ministry of Agriculture traces its lineage: the Council of Agriculture was formed under the Executive Yuan in 1984, and in May 2023 the Legislative Yuan passed the Organic Act elevating it to full ministry status as the Ministry of Agriculture, overseeing agriculture, forestry, fishery, animal husbandry and food affairs.

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

An EPA overview page on green infrastructure, explaining that rain or snow can pick up trash and chemicals as it flows into storm drains, and introducing solutions such as rain gardens, planter boxes, green roofs, and permeable pavement. The page does not present specific numeric data.

· Wikipedia · China

Sponge city is a Chinese urban planning model that uses green and wetland infrastructure to absorb, purify, and store rainwater. China piloted the model in 16 districts in 2015 and a further 15 cities in 2016, with a central government mandate that 80% of urban space adopt sponge-city adaptations and recycle at least 70% of rainfall by 2030. However, 19 of the 30 pilot cities have still experienced flooding since implementation, indicating implementation challenges.

· Wikipedia · Global

Rainwater harvesting (RWH) is a long-standing technique for collecting rainwater from roofs and other surfaces into tanks or reservoirs, used worldwide for water supply in water-scarce areas, flood mitigation, and cost savings. Frankfurt Airport's system saves about 1 million cubic meters of water per year, Mumbai has mandated RWH infrastructure for new buildings above certain sizes since 2002, and typical UK households can reduce water use by 20-30% through RWH.

· 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.

Bundesverband der Kleingartenvereine Deutschlands (BKD) · Bundesverband der Kleingartenvereine Deutschlands (BKD) · Germany

The national statistics page of the German federation of allotment garden associations (BKD). It gives the base figures — 867,092 plots, 44,000 hectares, an average plot of 370 square metres — along with the three-tier structure of roughly 13,000 clubs, 502 district federations and 20 state federations, membership by state, and a ranking of plots in the 15 largest cities (Berlin about 66,000, Leipzig 39,000). The nationwide average wait for a plot is three years, rising to seven in Berlin and eight in Hamburg. It also shows the skew by which the eastern states excluding Berlin, holding 15 per cent of the population, contain more than half of all allotments.

Gesellschaft für Schleswig-Holsteinische Geschichte · Gesellschaft für Schleswig-Holsteinische Geschichte · Germany

An encyclopaedia entry from the Society for Schleswig-Holstein History. It dates the appearance of 'poor gardens' in the duchies to the end of the 1820s and records that by 1826 they existed in 19 towns. In 1830 the Society of Voluntary Friends of the Poor in Kiel allocated plots on the municipal land at the Prüner Schlag at a size of 400 square metres — a size the entry says still holds today. The initiative is attributed to the governor Landgrave Carl of Hesse (1744–1836); the entry notes that the later allotment movement begun by the Leipzig physician D. M. Schreber (1808–1861) turned the poor gardens into Schrebergärten.

VGT Gartenfreunde Treptow e. V. · VGT Gartenfreunde Treptow e. V. · Germany

A source page in which the Berlin-Treptow garden association explains the Allotment and Small-Lease Ordinance of 31 July 1919 clause by clause. Section 1 put the rent for non-commercial horticultural land in the hands of the lower administrative authority, to be set in light of local conditions and land values after consulting agricultural and horticultural experts. Section 3 barred the landlord from terminating the lease, gave the holder a right to convert a loan for use into a lease, and a right to demand renewal once a term expired. Under section 4 an allotment office was set up in the Treptow district administration, which lasted until 1938. The association's 1948 statutes, the page notes, still referred back to the 1919 ordinance.

· Wikipedia (Deutsch) · Germany

The article on the history and scale of Germany's national allotment federation. Founded on 21 August 1921 as the Reich federation of German allotment associations, it later became the Bundesverband Deutscher Gartenfreunde and took its present name on 9 September 2023. It now covers more than 13,000 clubs and 20 state bodies, some 900,000 plots on 44,000 hectares used by around five million people — an area equal to 0.25 per cent of Germany's agricultural land. The article also carries the historical figures for 1938: one million members on 45,000 hectares, producing 350 million kg of fruit and 300 million kg of vegetables.

Landesverband Berlin der Gartenfreunde e. V. · Landesverband Berlin der Gartenfreunde e. V. · Germany

The Berlin state federation of garden friends tracing its own history. It counts roughly 40,000 'Pflanzer' in Berlin between 1890 and 1910 and places the origin of today's federation in the April 1901 union of all planter associations of Berlin and its surroundings. After a series of First World War emergency decrees capped rent increases and obliged municipalities to provide land for cultivation, the Allotment and Small-Lease Ordinance of 31 July 1919 imposed rent control, banned leasing for profit and allowed land to be secured compulsorily. On 20 October 1919 the board of Berlin's colonists voted to rename their body the central federation of German allotment associations; by 1929 the Berlin provincial federation had 66,570 members, and that year Rehberge in Wedding opened as what the page calls Germany's first permanent allotment colony.

Bundesverband der Kleingartenvereine Deutschlands (BKD) · Bundesverband der Kleingartenvereine Deutschlands (BKD) · Germany

The national allotment federation's own history page. It sorts the nineteenth-century origins into six lines — poor gardens, factory gardens, Red Cross workers' gardens, the Berlin arbour colonists, gardens of the natural-healing movement and the Schreber gardens — and states that these lacked state legitimation and legal rules, with the absence of termination protection and the head-tenant system (Generalpächtersystem) in particular obstructing lasting protection. It records the passage of the Kleingarten- und Kleinpachtlandordnung by the National Assembly in Weimar on 31 July 1919, which banned commercial head-leasing and required rents to be fixed; the 1909 founding of the central federation; the Reich government's 1916 establishment of a central office for vegetable growing in allotments; the founding of the Reich federation of German allotment associations on 14 August 1921 at the second Reich allotment congress in Bremen; the Nazi-era Gleichschaltung; the post-war split into the VDK (Bochum, 1949) in the West and the VKSK (Leipzig, 1959) in the East; the 1973 renaming to BDG; and the renaming to BKD on 9 September 2023.

Bezirksamt Pankow von Berlin · Bezirksamt Pankow von Berlin (berlin.de) · Germany

An exhibition text in which Berlin's Pankow district office traces the history of allotment sites in the district. It describes the spread of Red Cross workers' gardens in the early twentieth century and their consolidation in 1906 into the Verband deutscher Arbeitergärten vom Roten Kreuz under Alwin Bielefeldt (1857–1942); the head-tenant (Generalpächter) system common around the turn of the century, in which land was leased and sublet with contracts often running for a single year; and the Kleingarten- und Kleinpachtlandordnung of 31 July 1919, which gave legal protection and prohibited head-leasing. On the arbour colonists it records the first permanent municipal lease in Blankenburg on former sewage fields in 1910 and the 1911 formation of a unified federation of arbour colonists of Berlin and surroundings, and cites a 1912 survey finding that 70 per cent of Berlin schoolchildren had never seen a sunrise and 54 per cent no sunset. For the GDR period it notes the founding of the VKSK in 1959, more than a million members by 1988 and its dissolution on 27 October 1990; more recently, that of Berlin's 900 allotment sites roughly 600 were given permanent protection and about 160 only time-limited protection.

Deutsche UNESCO-Kommission · Deutsche UNESCO-Kommission · Germany

The German UNESCO Commission's page on the Berlin Modernism Housing Estates, inscribed as World Heritage in 2008. It lists the component estates: Gartenstadt Falkenberg (built 1913–1916), Siedlung Schillerpark (1924–1930), the Großsiedlung Britz or Horseshoe Estate (1925–1930), Waldsiedlung Zehlendorf (1926–1932), Wohnstadt Carl Legien (1928–1930), Weiße Stadt (1929–1931) and Großsiedlung Siemensstadt (1929–1934). Alongside the 2008 inscription it records that the Waldsiedlung Zehlendorf was added in July 2026; that estate has more than 1,900 dwelling units on 70 hectares. The architects named are Bruno Taut, Martin Wagner, Walter Gropius, Hans Scharoun, Hugo Häring and Otto Rudolf Salvisberg.

Landesdenkmalamt Berlin · Landesdenkmalamt Berlin (berlin.de) · Germany

A short notice issued by the Berlin State Heritage Office on 27 July 2026. It reports that on 26 July 2026 the 48th session of the UNESCO World Heritage Committee, meeting in Busan, South Korea, inscribed the Waldsiedlung Zehlendorf as the seventh component of the World Heritage site 'Berlin Modernism Housing Estates'. The estate was built between 1926 and 1932 by the housing cooperative GEHAG and comprises 1,917 dwellings — 1,108 in multi-storey blocks and 809 single-family houses. The architects were Bruno Taut, Hugo Häring and Otto Rudolph Salvisberg, with the open spaces designed by Leberecht Migge and Martha Willings-Göhre. It lies around the U-Bahn station Onkel Toms Hütte on line U3 and along Argentinische Allee in the Steglitz-Zehlendorf district. The nomination process began in 2021.

Berliner Forum für Geschichte und Gegenwart e.V. · Welterbe Siedlungen der Berliner Moderne (Berliner Forum für Geschichte und Gegenwart e.V.) · Germany

The page on the Britz Horseshoe Estate from the official site for the Berlin Modernism Housing Estates World Heritage property. Construction ran from 1925 to 1931, with Bruno Taut and Martin Wagner responsible for the overall plan and urban design and Leberecht Migge and Ottokar Wagler for the garden design. The estate comprises 1,963 dwellings — 679 single-family rowhouses and 1,284 flats — ranging from 1.5 to 5 rooms. The World Heritage property covers 37.1 hectares with a 73.1-hectare buffer zone, and the emblematic horseshoe-shaped main block is 350 metres long. It was inscribed as World Heritage in 2008 and designated a garden monument in 2010.