Grätzl-PPPs: City.Agriculture.

Devel­op­ment of a con­cept for basic every­day sup­ply of fruits and veg­eta­bles in cities

Urban agri­cul­ture is a rel­a­tive­ly old tech­nique for the pro­duc­tion of food in cities. Dur­ing the 19th cen­tu­ry indus­tri­al­iza­tion and urban­iza­tion led to the city gar­den move­ment, and in the post-war peri­ods peo­ple used their court­yards and allot­ments main­ly for food pro­duc­tion.

Sim­i­lar approach­es appear in the present, but more in a social con­text (e.g. gar­den­ing around the cor­ner, urban gar­den­ing, parklets).

With the rapid­ly grow­ing cities and glob­al­iza­tion, this form of local food pro­duc­tion has increas­ing­ly reduced in favor of indus­tri­al­ly and / or glob­al­ly pro­duced food that is sold via retail chains. In recent years, how­ev­er, there has been grow­ing inter­est in it.

Urban agri­cul­ture has many advan­tages — social and inclu­sive, and at least as much in terms of cli­mate pro­tec­tion and adap­ta­tion to cli­mate change.

In order to become a par­tial aspect for sus­tain­able and healthy food for the urban pop­u­la­tion, the urban agri­cul­ture sys­tem must be rethought and mod­ern­ized.

Areas such as house roofs, house walls and open spaces that are pos­si­ble for cul­ti­va­tion and oper­a­tion in a city must be iden­ti­fied and their poten­tial sys­tem­at­i­cal­ly ana­lyzed in terms of con­struc­tion, tech­nol­o­gy, legal and prac­ti­cal aspects.


Oper­at­ing strate­gies — from vol­un­tary work to employ­ment mod­els must be iden­ti­fied and there poten­tial eval­u­at­ed and test­ed.

It is impor­tant to har­mo­nize agri­cul­tur­al activ­i­ties with the city’s goals in terms of cli­mate change adap­ta­tion and pro­tec­tion, i.e. to pro­mote urban agri­cul­ture in areas iden­ti­fied as urban heat islands. There­fore cool­ing down the envi­ron­ment through urban agri­cul­ture and rain­wa­ter man­age­ment is a cru­cial part and par­tic­u­lar­ly nec­es­sary.

Also, it is cru­cial to stim­u­late busi­ness mod­els in the form of pub­lic-pri­vate part­ner­ship con­cepts.

We want to address all of these ques­tions in this project ini­tia­tive. The goal is to devel­op a fund­ing appli­ca­tion that includes the poten­tial analy­sis of urban spaces like described above, as well as the devel­op­ment of busi­ness mod­els for the oper­a­tion of urban agri­cul­ture in coop­er­a­tion with the pub­lic sec­tor. This should be done using pub­lic build­ings, such as case study schools, hos­pi­tals and senior cit­i­zen hous­es in Vien­na.

As a pilot  project, the roof of the Vien­na Gen­er­al Hos­pi­tal should be used with mar­ket­ing mea­sures to enable the first imple­men­ta­tion. At the same time, busi­ness part­ners will be addressed for the expan­sion of a larg­er area and the entire city lev­el as well as for start-up financ­ing.



  • Appli­ca­tion peri­od for project ini­tia­tives: 01.12.2019 – 28.02.2020
  • Ear­ly Bird tick­ets: 01.01.2020 – 31.01.2020
  • Ter­mi­na­tion of review pro­ce­dures for project ini­tia­tives: 15.03.2020
  • Reg­u­lar tick­et sale: 01.02.2020 – 31.03.2020
  • Con­gress: 16–17.04.2020
  • Analy­sis of the city’s poten­tial with regard to struc­tur­al, legal and prac­ti­cal issues
  • Pro­duc­tion types for the fol­low­ing areas: roofs, facades, inner court­yards, urban waste­lands
  • Pro­duc­tion process for dif­fer­ent pro­duc­tion areas along the entire val­ue chain
  • Tech­ni­cal con­struc­tion issues (access to the roof, struc­tur­al analy­sis, tech­ni­cal dif­fi­cul­ties of areas that are not opti­mal­ly suit­able, roof cov­er­ing, etc.)
  • Legal ques­tions: ques­tions of ded­i­ca­tion, ques­tions of ten­an­cy law, ques­tions of trade law, build­ing reg­u­la­tions
  • Har­mo­niza­tion with strate­gic goals of the city, in par­tic­u­lar cool­ing, increas­ing bio­di­ver­si­ty, rain­wa­ter man­age­ment
  • Devel­op­ment of busi­ness mod­els for urban agri­cul­ture.
  • Net­work­ing of com­pa­nies for sales, cross-con­nec­tion to the eco-pur­chase pro­gram of the City of Vien­na
  • Devel­op­ment of an umbrel­la orga­ni­za­tion that is respon­si­ble for infor­ma­tion, sales, pur­chas­ing, mar­ket­ing, etc.

Food secu­ri­ty, region­al­i­ty, sus­tain­abil­i­ty

We are looking for:

Max­i­mum 25 par­tic­i­pants with the fol­low­ing back­ground for the

Grät­zl PPP” City.Agriculture. Project:

  • Agri­cul­ture / Hor­ti­cul­ture
  • Gas­tron­o­my
  • Land­scape Archi­tec­ture
  • Civ­il Engi­neers
  • Plan­ning
  • Munic­i­pal­i­ty
  • Experts in financ­ing options
  • Civil­ians

    Green4Cities Ltd.
    Phone +43 676 330 28 04
    Plenergasse 1 Top 5, 1180 Vienna
    Austria • Europe