When to come — and when to absolutely avoid
By season
Quietest: November to mid-March, excluding the Christmas–New Year week and the Dutch krokusvakantie school break in February. The cold filters out casual day-trippers.
Busiest: Late March to August, with the absolute peak during tulip season (mid-April to mid-May) and the Dutch August school holidays. If you can possibly avoid these dates, do.
By day of the week
Tuesday and Wednesday mornings are calmest. Saturdays are always packed; Sundays only marginally less. Friday late nights have a different, more relaxed crowd — fewer tour groups, more locals on date night.
By time of day
The first slot at 09:00 and slots after 16:00 are noticeably quieter than the 11:00–14:00 peak when most cruise-ship and bus groups arrive. The Sunflowers room is at its calmest in the first 30 minutes after opening or in the final hour before close.