Both buildings are still experimental. The basic building material (if you can call it that) is willow; later prototypes of Baubotanik buildings were made with sycamore, for example, Cube en platane greffé in Nagold from 2012.

Ludwig: “Although most people think that the crown of a tree “pushes up” during growth, growth in height only takes place at the top of the shoot; the trunk shows growth only in volume. Therefore, only the basic geometry of our structures changes. Growth in scale allows technical components to grow and grow, but also requires structures that are designed to withstand the natural pressure of growth. Obviously, not everything can be calculated, because the dynamics of growth implies that there is always a certain uncertainty – a constructively difficult, but conceptually exciting aspect of Baubotanics. In an urban space, Baubotanik can make a big contribution because tree structures have a high evaporative effect and water can thus be productively used to cool buildings and the city. We believe that our approach provides new opportunities, which are “rooted” in the architecture and design of open space in the medium and long term.

https://futurearchitectureplatform.org/projects/537905c7-70ab-4bbb-a4a9-3ef833f1c078/

The artist Richard Reames has the same approach to nature and creativity, who in 1995 wrote “How to grow a chair: The art of tree trunk topiary”, and in 2005 called his second book “Arborsculpture: Solutions for a Small Planet”. Arborsculpture is the art of shaping living trees and woody plants into sculptural forms, furniture and shelters

https://humanecology.ucdavis.edu/sites/g/files/dgvnsk161/files/inline-files/TLink.pdf 

In my 3rd year of college, under the mentorship of one of my favorite professors, Boris Morsan, I designed an office building inextricably linked to Zagreb’s urban context with the application of some principles of Baubotanics, but again not so boldly. Namely, I used steel as the basic structure, and climbing plants (three-leaved vine: Parthenocissus tricuspidata (Siebold et Zucc.) Planchon) is a deciduous climbing plant from the vine family (Vitaceae) Source: Trolisna lozica were a secondary construction, i.e. a binder that changes the transparency of the facade with the seasons and over time.