Artist collective de Onkruidenier was founded in 2013 and the team consists of Jonmar van Vlijmen, Rosanne van Wijk and Ronald Boer. The collective investigates historical, cultural and potential transformations of nature and its potential to evolve humans. They do fieldwork – often in conjunction with audiences – collecting plants, the stories and histories associated with them. As ecosystem futurists, they speculate on aquatic culture to arrive at new interpretations of the relationship between humans and (urban) nature, both above and below sea level. An important role is played here by questioning systems that are usually taken for granted. In the development of their work, interactions with the public and experts such as farmers, residents and scientists create new stories.

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Ronald Boer

Jonmar van Vlijmen

Rosanne van Wijk


De Onkruidenier
Onderlangs 37d2
1097ZL Amsterdam


De Onkruidenier
De Wittenstraat 73 b
1052AN Amsterdam

Artist collective the Onkruidenier was founded in 2013. The core team consists of Jonmar van Vlijmen, Rosanne van Wijk and Ronald Boer.

The board of foundation de Onkruidenier is formed by chair Jacqueline Heerema (conceptual artist and founder Satellietgroep) and secretary Katharina Nöteberg (urban planner at the municipality of Amsterdam). We are currently looking for a new treasurer.

Our website was developed in collaboration with graphic designers Maaike Besseling and Floor Weijs in collaboration with web developer Bernd de Ridder.

Every year we can offer space for one intern.
Interested? Send us an email with your motivation, portfolio and ask about the possibilities.



Articles Dutch
Metropolis M
Oersoep – De Onkruidenier in het Van Abbemuseum

Mister Motley
Interspecies Supermarket – leren navigeren tussen land- en zeedenken

Witte Rook
Meebewegen met de bomen

Articles English
Circo Strada
Adapting to the elasticity of a landscape

Podcast Dutch
Kunst is lang: Kunst is collectief

Are you planning to pay attention to the work of de Onkruidenier?
If so, please contact Jonmar van Vlijmen;

The beautiful pictures on our website are shot by professional photographers and cannot be used without our permission. Please ask us for permission so we can discuss it with the photographer in question.

Image by Maaike Besseling

How often does it happen that you pick a color in your interior, your wardrobe, or in the case of this website; colors of texts and color planes. In the design process we were dwelling on the endless possibilities of colors in toolbars of design programs without realizing what worlds are hidden behind those square boxes. So the idea was born to enlist the help of an expert in the field of natural pigments.

Lucila Kenny told a passionate story about how you can produce an enormously rich palette of colors from a lot of plant material. Even with one plant as a base material you can produce an almost infinite variety of shades by influencing the PH value. 

One remarkable observation will always remain with us; Lucila told us that it is almost impossible to produce the color green from plant origin from one base material. Hence, the color green, which had previously been an important part of de Onkruidenier’s visual identity, no longer appears in the palette. A number of test samples Lucila provided us with, formed the color palette for this website.

More information on natural dyes