In which country is the Flowers 4 Florists wholesaler located?

Flowers 4 Florists' mailing address is "PO Box 59, 2230 AB Rijnsburg, the Netherlands," making it a Dutch company. However, they deliver flowers to the following countries: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxemburg, Netherlands, Portugal, Spain, Sweden, and the UK.