From Stamps of the World
Boskoop is a town in the province of South Holland. It was a separate municipality until it merged into Alphen aan den Rijn in 2014. The town had a population of 15,050 in 2012 and covers an area of 7.29 km2 (2.81 sq mi) of which 1.39 km2 (0.54 sq mi) is water. It's the world's biggest joined floriculture area. The name "Boskoop" has been given to an apple cultivar (Belle de Boskoop) which is widely distributed in the Low Countries, to a grape variety (Boskoop Glory) and also to a variety of Calluna (Boskoop) and Weigela (Boskoop Glory) and blackcurrant ("Boskoop Giant").
Read more @ https://en.wikipedia.org/wiki/Boskoop