• Environmental Protection

    Sustainability at Lorenz von Ehren


Environmental Protection - Sustainability at Lorenz von Ehren

Conserving resources, preserving biodiversity – these are company standards for us
As a selected external EXPO location, the Lorenz von Ehren tree nursery was already internationally recognised for its high environmental standards as early as the year 2000. With its concept "A new dispatch and advice centre in harmony with nature", the company demonstrates its careful use of resources, adaptation to landscape conditions, minimisation of impairments, use of biological counterparts and production in water protection areas. 
Since 2014, we have been an environmental partner of the City of Hamburg . We were also certified in accordance with the “ECOPROFIT” environmental programme. We are currently participating in the project “Sustainability Strategy for Production Horticulture in Hamburg". 
But we also do much more! 
  • Sowing of bee friendly flowers 
  • Roof greening
  • Erosion control in the nursery fields
  • Oil radish as fertilizer
  • Drip irrigation

Our actions

Our actions are shaped by the awareness that our environment is unique, that we live with and from it,  and that we should not be allowed to exploit it.  Resource conservation, drip irrigation, electromobility, biodiversity, monitoring - these are keywords that play an important role in all aspects of our business activities. 



Up to 1.5 mm of topsoil is lost from arable land each year due to wind erosion. In the nursery, green manure plants and grass sowing prevent erosion and provide the soil with a constant supply of dry matter. This means that Lorenz von Ehren is able to return all leased farmlands in the condition in which they were taken over.

Green manure - regeneration and nutrient pasture

For years, the nursery has been promoting natural cycles, for example with the widespread use of green manure plants. Buckwheat, oil radish, yellow mustard, sunflowers and grass are suitable for this. The following was achieved:
  • a reduction of herbicide use by at least 80%
  • a reduction drying out of the soil due to shading
  • soil loosening to a depth of 80 cm
  • better water flow in the soil (e.g. drainage)
  • no further tillage during the vegetation period
  • the promotion of soil life
  • a favourable microclimate thanks to an even temperature, oxygen and water balance in the soil
  • healthy plant growth
  • addition of organic matter to the humus
  • environmentally-friendly energy return
For the animal and plant world, green manure brings invaluable advantages and is widely visible. The flowering crops provide pasture for bees and add patches of colour to the land.

Animal welfare – The tree nursery as a feel-good oasis

To actively protect birds, we provide them with optimal living conditions; among other things by installing about 250 nesting boxes. Birds help us to protect our woody plants from harmful organisms.

We thus maintain a high species diversity on our land; even small creatures such as bees, provide our planting beds with habitats and food sources. Our healthy bee colonies are a particular indicator of our environmentally friendly production.
But it is not only honey bees who feel at home with us, wild bees do as well.
We support Netzwerk Blühende Landschaft's (Blooming Landscape Network) “Bee Flower Kingdom” project with 10,000 m² of tree nursery area, and have also cleared a further hectare for our self-initiated insect protection.

A tree nursery generally provides bees with many sources of food, because shrubs such as the Field maple (Acer campestre), Lime (Tilia), Chestnut (Castanea sativa), Apple (malus in species and varieties) or the English oak (Quercus petraea, Quercus robur), are natural sources of food for insects such as honey bees, wild bees and bumble bees (see LvE plant reference book Page 1056).
  • One of the 250 nesting boxes
  • Sowing of flower seeds 
  • Space for the insects
  • Habitat for butterflies etc.
  • They are producing the „LvE Nursery Honey“
  • Our information sign

We do something for the environment!

Overall, the situation in our landscape for all nectar and 
pollen collecting insects, such as honey bees, wild bees or butterflies has deteriorated enormously. Flower-visiting insects fulfil important functions in nature upon which humans also depend, such as pollination of wild and useful plants. They are also an important component of our environment’s food web.



It goes without saying that we also treat water as a conservable resource and continue to use the waste water produced on our premises ­– whether grey or surface water – after it has been cleaned (picture: reed bed treatment plant). We thus prevent precious water from seeping away or being discharged directly into the sewer network. 

We also water our trees and shrubs just as sparingly with drip irrigation (picture), which is intermittent and thus saves water.



The 92 x 60 metre dispatch hall is the central building on the company premises. A workshop and a shed were built in the immediate vicinity.
In June 1994, all three buildings received an extensive roof greening over a total area of 6740 m². The vegetation mat on the dispatch hall is approx. 5 mm thick. The species-rich mixed vegetation consists of drought-resistant and stress-conditioned mosses, thickleaf plants (sedum), herbs and grasses. The inclination of the roof creates different and varied habitats for insects. 

Lorenz von Ehren GmbH

& Co. KG

Maldfeldstr. 4
21077 Hamburg
+49 (40) 76108-0

+49 (40) 76108-100