The story of the WeGrow Group – from the windowsill in Bonn to the whole world

More than 13 years ago, the two founders of WeGrow discovered the Kiri tree in the botanical garden of the University of Bonn, Germany. They founded the company in their student appartement. Today, the company supplies customers in 47 countries worldwide.

WeGrow AG – driven by passion and innovative spirit

The company WeGrow was founded in 2009 by agranomist Peter Diessenbacher and economist Allin Gasparian. During their student days at the University of Bonn, Germany, the two founders discovered the extremely fast-growing Kiri tree in the university’s botanical garden. With their first own Kiri tree variety, NordMax21®, the two succeeded for the first time in successfully cultivating the Kiri tree for sustainable timber production in Germany as well. What began under the pitched roof of Diessenbacher’s student flat has since developed into the market-leading company in the field of sustainable Kiri wood production in Europe. However, with customers in 47 countries on 5 continents by now, WeGrow has also been able to position itself successfully beyond the borders of Europe.

The history of WeGrow AG at a glance


Foundation of WeGrow GmbH

as a spin-off of the University of Bonn, Germany, Department of Renewable Resources


First Kiri cultivation area in Germany

on five hectares


Establishment of the horticulture business

with its own greenhouses

Protection of the variety NordMax21®

Paulownia tomentosa x Paulownia fortunei

First own in-vitro laboratory

with three workstations


New company headquarters in Tönisvorst

and second branch in Güstrow

European plant variety protection for PhoenixOne®

Paulownia elongata x Paulownia fortunei


Foundation of WeGrow AgriTec SL, Spain

Partner for plantation management in Talavera de la Reina


New in-vitro laboratory

with 20 workstations at the Tönisvorst site

Plant variety protection for our hybrid breeds H2F3® and H2F4®

Paulownia catalpifolia x Paulownia fortunei

Further internationalisation of the business

with cultivation partnerships in Africa and Latin America


Opening of the first own sawmill

for wood processing at the Tönisvorst site


Foundation of WeGrow AG

Opening of the company to investors


WeGrow supplies customers in 47 countries

850,000 young trees are delivered

Wood-based building materials

Planning of a fully automated KiriFactory for the production of wood-based building materials: KiriBloX, KiriTherm®, KiriDur®