The deal values Dummen at about 500m euros and follows other private equity moves into the gardening market.
Consolidation in the market could continue with BC Partners involvement. Syngenta Seeds and Thompson & Morgan are among big businesses for sale and Dummen has a strong track record of acquisitions.
Dümmen Orange chief executive officer Biense Visser said: "The new majority shareholder is a well-respected and distinguished Private Equity company with hands on business approach. Their track record as an investor is successful. They have supported many companies in reaching their full potential. As management, we have built a good understanding with them during the last period and we are pleased to see that their trust in our company is big. BC Partners will support Dümmen Orange to further grow and professionalise the company in line with the chosen strategy."
BC Partners managing partner Jean-Baptiste Wautier said: "Dümmen Orange is a thriving, innovative and growing business, led by a talented and experienced management team, which has an impressive track-record in floriculture and related sectors. We look forward to backing them as they pursue an ambitious growth strategy, fueled by investments in sales & marketing, advances in breeding technologies and selective acquisitions."
Japanese Kirin Holdings Co took over Fides (Netherlands) and Barberet & Blanc (France) and created the Kirin Agribio Group in 1993. In 2010 Dutch investment company H2 Equity Partners bought the group. In 2013 the Agribio Group merged with German breeder Dümmen, renamed Dümmen Orange in 2015. Florexpo, Lex+, Ecke, Bartels Stek, Terra Nova and Rijnplant have been bought by the group.