Research & reports

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.

· Wikipedia (Deutsch) · Germany

The article on the VKSK, East Germany's national allotment organisation. Founded in Leipzig on 29 November 1959, it held the exclusive right to establish allotment sites. Membership stood at about 850,000 in 1962 and reached roughly 1.5 million by 1988. An extraordinary congress on 27 October 1990 resolved to dissolve the body with effect from 31 December 1990, and its gardeners and clubs passed into the all-German federation that followed.

· Wikipedia (Deutsch) · Germany

The article on Germany's intercultural gardens. The pilot project grew out of the initiative of immigrant families in Göttingen-Geismar in 1996, and as of 2025 more than 400 intercultural garden projects exist across the country. Support centres on the Stiftung Interkultur in Munich, described as a creation of the foundation partnership anstiftung & ertomis. The association at the movement's origin, Internationale Gärten e. V. Göttingen, was set up in 1998 and runs three gardens covering 11,000 square metres with around 70 families from 25 countries.

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.

· Wikipedia (English) · Germany

The article on the German food crisis of 1916–17 during the First World War. It states that the Allied blockade reduced food supplies by 33 per cent and that the civilian diet fell to 1,560 calories a day by the summer of 1917 and to 1,000 calories a day in winter, against the 3,000 calories said to be needed by a healthy adult male. The name comes from the substitution of fodder swedes (turnips) for the failed potato crop. Female mortality is given as rising 11.5 per cent in 1916 and 30 per cent in 1917 against pre-war rates, and the historian G. J. Meyer is cited, quoting a Berlin physician, for the claim that eighty thousand children died of starvation in 1916. The historian Avner Offer is cited for the estimate that one-fifth to one-third of food could be obtained only through illegal channels.

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.

· Frontiers in Sustainable Food Systems · Spain (Barcelona)

A study analysing both the agronomic and the organisational dimensions of Barcelona's community gardens, examining empirically how citizen-led urban gardens are managed and run.

Amici A. S., Appicciutoli D., Bentivoglio D., Staffolani G., Chiaraluce G., Mogetta M., Finco A. · Frontiers in Sustainable Food Systems 9:1584778 · Italy

Assesses the profitability of two microgreen-producing vertical farms in northern Italy using semi-structured interviews, applying operational margin and cost-revenue ratios to show these systems are economically profitable under current Italian conditions.

Wilkens J., Mombo S., Dumat C. · Urban Science · France (Toulouse)

Examines 11 years of collective urban gardens in the Toulouse region through the lens of global health—encompassing human well-being, soil health, and interspecies interactions—as a driver of agroecological transitions among gardeners.

Irigoyen I., López M., Orden L., Moral R., Nogués I., Bustamante M.Á. · Agronomy · Europe (urban agriculture focus)

June 2025 study examining how decentralized and community composting are emerging as novel scenarios favoring localized management and valorization of organic waste streams. Supports organic waste reduction at community level and nutrient cycling for urban agriculture fertilization, offering alternatives to centralized composting.

· Landscape Ecology · Germany (Berlin, Munich)

Recorded pollinators and garden features across 33 community gardens in Berlin and Munich over two summers, finding local-scale garden features—rather than landscape context—predominantly structured urban pollinator communities.

Amato-Lourenço L., Bertoldi C., van Praagh M., Rillig M. · Environmental Pollution · Germany (Berlin)

Investigated vertical distribution of microplastics over 90 days in three Berlin allotment gardens; fibers dominated and peaked in surface layers, with deposition increasing with precipitation and PM2.5 and decreasing with wind velocity.

Sexton A., Conitz F., Sturm U., Egerer M. · Ecology and Evolution · Germany (Berlin, Munich)

Using four years of plant community data from 30+ community gardens in Berlin and Munich, found no support for urban biotic homogenization—wild plant species instead showed increased biotic differentiation with urbanization.

· Urban Planning · Germany (Berlin)

Critically reflects on the transformative potential and democratic character of the Berlin Food Policy Council (Ernährungsrat).

Leimkühler · Urban Agriculture & Regional Food Systems · Germany (Dortmund)

Examines the food network of the city of Dortmund and how it can support the transformation of urban food systems.

· Turkish Journal of Agriculture - Food Science and Technology · Turkey

Produces bokashi compost by fermenting vegetable and fruit wastes with lacto serum and bran in vacuum buckets for 28 days, then characterizes the resulting compost.

Kootanoor Sheshadrivasan V., Langhammer J., Scheiffele L., Terschlüsen J., Francke T. · Sensors · Germany

Develops an open-source, off-grid, low-cost soil moisture monitoring station (picoSMMS) built from consumer electronics and programmed in MicroPython, and performs unit-specific calibration of a popular low-cost capacitive sensor (DFRobot SEN0193).

Darcy · Health & Social Care in the Community · England, United Kingdom

A before-and-after cohort evaluation of nature-based interventions delivered via green social prescribing referral across English 'test and learn' sites, comparing participants' mental health and wellbeing outcomes.

· Sustainability · Barcelona, Spain

A systematic review integrating circular economy principles with urban agriculture to build resilient, low-emission urban food systems, using metropolitan Barcelona as a case, discussing zero-waste strategies including redistribution of surplus food.