Oserian was the first farm to start testing roses officially in East Africa in 1982.

Oserian was the first flower farm to be accredited to Fairtrade in 2004.

The company operates a 2.5 MW Geothermal Power plant and uses geothermal energy for power production, heating of greenhouses, production of carbon dioxide and treatment of recycle water from the greenhouses. The heating allows for greenhouse climate control which ultimately allows for a reduction in chemical and pesticide usage.

The farm is spread over 230 hectares focusing on roses, statice and spray carnations, selling approximately 380 million stems on an annual basis and employing 4,500 employees.

The Oserian Wildlife Conservancy lies on 18,000 acres of land and is home to a number of key species of white rhino, Grevy’s zebra, colobus monkey, leopard, lion, wild hunting dog and the aardvark – all of which are classified at varying levels of endangerment.

The Zwager family has created a tourism venture consisting of two world-class safari lodges. Funds raised through tourism are reinvested into the Conservancy’s conservation programmes.

Oserian have set aside more than 2,000 acres to accommodate and protect wildlife corridors. This enables various species to move freely from the Hell’s Gate National Park to Lake Naivasha, and back.

Oserian has a one hectare forestry nursery that produces tree seedlings for the estate and wider Naivasha Community.

Oserian hosts many types of indigenous fauna including 320 bird species. Oserian is home to a number of threatened bird species such as the African Fish Eagle, Augur buzzard and Grey Crested Helmet Shrike.

Oserian is recognised as a ‘Champion of Nature’ by the World Wildlife Fund.