Keukenhof has opened it's doors and these will stay open until the 17th of May. I intend to go there soon to actually see it myself but had to mention this here to let you know.
Keukenhof ("Kitchen garden"), also known as the Garden of Europe, is the world's second largest flower garden following Dubai Miracle Garden. It is situated in Lisse, the Netherlands. According to the official website for the Keukenhof Park, approximately 7 million flower bulbs are planted annually in the park, which covers an area of 32 hectares (79 acres).
Keukenhof is located in South Holland in the small town of Lisse, south of Haarlem and southwest of Amsterdam. It is accessible by bus from the train stations of Haarlem, Leiden and Schiphol. It is located in an area called the "Dune and Bulb Region" (Duin- en Bollenstreek). via wikipedia