Our projects

Projekt Slussen, Stockholm

Mylla No1 found its way into Stockholm City’s pioneering Slussen renovation. The Projekt Slussen installation showcases how living soil systems can be integrated into one of Europe’s most complex urban infrastructure projects, combining robust engineering with long‑term plant health and resilient, biologically active growing media. Mylla No1 is a flagship substrate in a flagship project.

2024-2025

Sveavägen, Stockholm - Trafikkontoret

Mylla No1 was utilised for its tremendous potency to support the establishment and continued growth of these Goldenrain trees (Koelreuteria paniculata) on Sveavägen. These potted trees are displaying profound levels of health, vigour & vitality.

2025

Skärgårdskuppan - Värmdö, Stockholm

Rehabilitation of contaminated soil media. Over a 3 year period, our product rebuilt soil fertility whilst implementing a foliar feeding nutritional program. Over 3 growing seasons we revived the whole garden, now managed fully by the head gardener.

2023-2025

Engelsberg's Bruk UNESCO World Heritage Site, Västmanland, Sweden

Soil Rehabilitation of contaminated soil environment for establishment of large transplants. The remediation program took place between the years of 2015-2018 with over 30 specimens treated with no failures. The site is still under our management.

2009-To Present

Brommaplan, Stockholm- PEAB

Our substrate was used for these downy oaks (Quercus pubescens) during establishment, and the trees are showing exceptional health and vitality in a very challenging streetscape environment. Despite regular salt exposure in spring and pronounced heat stress at the height of the growing season, they are maintaining strong water turgor, high photosynthetic activity, and a very good level of disease resistance.

2024-2025

Norrmälarstrand, Stockholm- PEAB

This green pocket was revitalised using our substrate. Celtis australis, Calycanthus and Heptacodium spp. were transplanted here in 2025 and are all showing strong health and vitality. Even the earlier‑planted magnolias are now benefiting from the improved soil conditions created by the later additions of Mylla No1.

2025

Ösmo, Nynäshman

Two Fagus sylvatica, planted side by side in identical conditions.

Left: planted with Mylla No1.

Right: planted without.

The Mylla tree shows visibly higher leaf density, better leaf turgor, and a fuller canopy. Sap analysis reveals elevated Brix (stronger sugar production), along with balanced sap pH and EC, both pointing to healthier nutrient uptake and internal balance. Our Mylla tree continues to pull ahead in establishment, pushing roots and canopy faster in this high‑latitude urban site..

2024

Reach out to me

If you have any questions, or would like to explore how this product could support your projects, please don’t hesitate to get in touch. I developed this substrate from scratch to honour the importance of trees in our landscapes, with the clear intention that you, your clients, and your trees receive uncompromising quality from the very beginning.

Our product is made to order, with pricing based on volume. I am happy to discuss the needs of your project via email, phone, or a site visit.

Importantly, our substrates are completely peat‑free and do not rely on the excavation of intact ecosystems to source raw materials. Wherever possible, we work with organic feedstocks and suppliers who share this commitment.

Best regards,

Josef

Contact

59degrees Soil Architects

Soil architecture for biological function.

info@59degrees.com