The Reed City: How One Local Plant Could Help Münster Build More Homes and Beat the Floods

This project plans to forecast the future of the 10,000 cities across the globe -- as though they have survived climate change and social discord and gone on to flourish anew. Today, we highlight the future of Münster, Germany.

Münster faces two problems that might seem unrelated: a shortage of affordable housing and streets that can become dangerous when intense storms overwhelm urban drainage. Yet a surprisingly simple part of the solution could grow in the wetlands and waterways of the Münsterland: the common reed (Phragmites australis). This tall, resilient plant already plays a role in wetland ecosystems, where its dense stems and root systems help stabilise soils and provide habitat. What if Münster began treating suitable, sustainably cultivated reeds not as ordinary vegetation, but as a valuable resource for a new generation of climate-resilient neighbourhoods? The idea would connect local ecology, innovative construction and urban water management in one ambitious project.

The first opportunity is housing. Reed has a long history as a building material, particularly for roofing, and can also be developed into natural-fibre insulation and other lightweight construction products. With appropriate processing, fire protection and building certification, locally cultivated reed could supply components for prefabricated housing, renovations and affordable residential developments. Imagine new homes designed around renewable materials, excellent insulation and low-carbon construction, with reed-based panels helping to reduce demand for more resource-intensive products. Such materials would not magically make housing affordable: land prices, planning rules, labour and finance would still matter. But a local supply chain could create skilled jobs, support regional growers and give Münster another way to build sustainably.

The Reed City -- Münster in the Future

The second opportunity is to redesign flood-prone streets as living water-management systems. Münster experienced an extraordinary storm in July 2014, when approximately 292 litres of rain fell per square metre in seven hours, flooding roads, buildings and neighbourhoods. The city's own climate-adaptation strategy recognises the need to slow, store and absorb rainfall rather than relying entirely on drains and sewers. Carefully designed reed beds, planted drainage channels and rainwater-retention areas could help collect runoff from roads, roofs and paved courtyards, allowing water to settle and move through the landscape more slowly. These systems would need appropriate soils, storage capacity, overflow routes and maintenance; reeds alone cannot prevent flash floods. But integrated into a wider network of rain gardens, permeable surfaces and restored waterways, they could make streets safer while creating green corridors for wildlife.

The vision is a Reed City of Münster: affordable homes built partly from renewable plant materials, surrounded by green courtyards and connected by streets that work more like wetlands when the rain arrives. Vacant or underused urban sites could become demonstration projects combining prefabricated housing, reed-based insulation, water-retention landscapes and community gardens. Farmers and wetland managers could supply responsibly grown material, while architects, engineers, housing cooperatives and local government collaborate on the design. Crucially, reeds should be cultivated or harvested only where ecologically appropriate, without damaging existing wetlands or displacing valuable habitats. Münster would still need serious housing policy and engineered flood protection, but one locally appropriate plant could help link the two agendas. Instead of treating housing and stormwater as separate urban problems, the city could build a future in which the materials that shelter people also help restore the natural systems that protect them.