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Sustainability

Our Brewery was built with sustainable development firmly in mind. Here's some examples of how we put this into practice daily...

The Garden Brewery Tour The Garden Brewery Tour The Garden Brewery Tour

1. Solar Powered Beer

In August 2025, we installed a 161.98 kWp solar power plant on the roofs of our Zagreb Brewery and Taproom as part of our ongoing commitment to, put simply, doing the right thing sustainability wise. Yes, it also makes economic sense as the investment will pay for itself within a couple of years and then save us significant ongoing costs. And yes we're also happy to have control of a good part of our own energy needs for many reasons too. But quite simply Croatia is very sunny a lot of the time - and it's just the right thing to do.

Another great reason to enjoy The Garden Brewery beers.

They're solar powered by the Croatian sunshine.

The details

A modern photovoltaic system (using regional solar yield data for our Croatian region) can generate 1,200 kWh per installed kWp per year so we've the theoretical ability to generate 194,000 kWh per year. This is affected by the weather of course with output dropping during overcast months. Initial data shows in August 2025 we generated 5.2MWh - 35.37% of our energy needs - whereas in the overcast months this was 17.7%. In the real world situation we believe our solar panel facility will generate about 25% of our energy needs. This is a substantial contribution to our Carbon emission reduction and a big step towards a more sustainable and self-sufficient production process.

2. Sustainable build

In April 2022 – after 5 years in our previous brewery and taproom – we moved to a greatly expanded new facility in a former garden centre just a few hundred metres down the road in Zitnjak, Zagreb.

Being smart and sustainable was key to this new build.

The Garden Brewery Case Study
The Garden Brewery Case Study

We removed large concrete areas to create a large outdoor garden complete with 40+ mature trees and a large lawn. This – along with our indoor trees in our large glass atrium taproom – are irrigated using brewery waste water. The trees create a beautiful  microclimate and natural shade. We also used fungi instead of chemical fertilizers, water permeable building surface materials, eco-friendly materials and native plants. Better for the environment, local birds and animals and our staff and customers.

There’s more we can do and we’re working on it but this is a significant and positive step we’re proud of. This work was done with Werft Gardens & Landscapes and Milan Štrbac from US Architects.

3. Native Plants

We took advantage of local evolutionary adaptation benefits (over non-native species) to ensure

  • restoration of natural habitats and food sources for local birds and animals
  • more efficient use of water
  • increased resistant to local weather, pests, drought and environmental risks
  • low-maintenance update, non-invasive and no need for chemical fertilizers

4. Water-Permeable Surface Materials*

We replaced a large concrete area with a garden with lawn, trees and porous surface materials to allow water flow and re-established a natural hydrological balance, benefiting the environment and our staff and customers via a more pleasant climate

Benefits include

  • creation of a new microclimate with lower temperatures (via the cooling of absorbed water evaporation), increased natural moisture and lower dust levels
  • replenished groundwater reservoirs with reduced pollutants due to percolation
  • increased flood prevention and reduced run-off to gutters and storm drains

In contrast non-permeable surfaces (like concrete) heat up in sunlight

* Stabilizer 2000 is a decomposed granite with non-toxic, organic binder that produces a water-permeable surface with hollows that retain some rain water that evaporate back into the atmosphere

5. Mycorrhiza: Natural Organic Fertilizer

We introduced mycorrhizal filaments; fungi that create symbiotic relationships with plants, in effect extending their root systems, meaning no chemical fertilizers were needed.

Mycorrhiza

  • increase the length and surface area of plants’ root systems
  • increase the efficiency of nutrient and water absorption
  • release powerful positive organic compounds into the soil

Scientific studies show mycorrhizal populations are slow to recolonize naturally so reintroducing them into areas where they’ve been lost dramatically improves plant health and performance

6. Tree-Planting Creating a Microclimate

Microclimates are created by local differences in heat or water absorbed or emitted near the surface. Human comfort is impacted by environmental variables like solar radiation, air and surface temperature, humidity and wind speed.

Trees impact urban microclimates in many positive ways, acting as natural air conditioners

  • intercept solar radiation
  • provide shade
  • direct air flow and wind speed
  • cool high air temperatures by water evaporation from leaves and soil
  • warm cool air temperatures by blocking and slowing wind speed

Positive modification of urban microclimates helps conserve energy and provide passive cooling or warming.

7. Energy-efficient planting

We used self-sustainable species that are

  • pest & disease resistant
  • drought tolerant (once established)
  • long-living
  • winter hardy
  • suited to the local soil type and pH

This policy will help us develop a local microclimate and an energy-efficient garden that require less water, fertilizer, labour, maintenance and plant replacement

8. Brewery wastewater

We recycle our brewery wastewater on-site to irrigate our entire garden: internal and external plants and trees and our lawn. This not only saves money but also

  • reduces our freshwater consumption
  • removes the need to transport fresh water to us

9. Eco-friendly materials

We used wood and stone, local, low-energy renewable materials, avoiding plastic and synthetic materials where possible to

  • decrease the amount of material sent to landfill
  • improve energy and water efficiency
  • reduce greenhouse gas emissions
  • prevent toxic chemicals from leaching into the soil and waterways

10. We love aluminium cans

Here's 5 reasons why…

1. Environmentally Friendly
1. Environmentally Friendly

Cans are better for the environment, aluminium is 100% "infinitely recyclable" so every part can be used again without loss.

2. Keeps Out Oxygen
2. Keeps Out Oxygen

Cans are air-tight, keeping oxygen out and our beers Garden fresh. Oxygen mutes flavour and makes beers taste dull.

3. Lightweight
3. Lightweight

Cans are lighter and more compact, meaning less transport costs for us (and pollution) and less arm ache for you for the beach or national park.

4. Keeps Out Light
4. Keeps Out Light

UV light damages beer's flavour and aroma by affecting the hops. No light = no damage. Clear glass offers no protection, cans the best.

5. Chills Better
5. Chills Better

If you love beer cold - especially in Summer - cans are for you, they chill much faster than glass and you can fit a lot more in the fridge.

11. Spent grain

We donate all our used grain (malts, barley, wheats, oats) after brewing to several local farmers as animal feed. This was 280 tonnes in 2025! A lot of waste saved and reused

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