Jildau,
Our last trip was the past April and we visited the Keukenhof and the Floriade as well as the flower market at Schipal - we had a great time
Carrie,
Unfortunately I've missed the Floriade, but I hear it was great! When visiting the Netherlands, the Keukenhof is of course a must see. :-) Maybe for your next trip: 'De Orchideeën hoeve' in Luttelgeest (a small place in our Noordoostpolder).