As of right now I am in the Netherlands in the winter months. Unfortunately I'm not going to be able to visit the tulip fields when they are in bloom.
Bulb growers have created a place called Keukenhof Gardens.
You can visit this location late March to late May daily from 8am-7pm. Cost is 12.50 euro for admissions.
The town the gardens are located is called Lisse, which is 15m north of Leiden.
This is the largest flower gardens in the world, dating back to 1949. Several million flowers are on show for their full flowering period. You can easily spend an entire day here!
Some interesting facts regarding the bulbs:
The Dutch call the bulb fields "pancake flat." Many fields stretch from Leiden towards Haarlem supporting over a billion euro industry with over 10 thousand growers. Bulbs have been around since the late 16th century. Carolus Clusius, a Dutch botanist and one-time gardener brought the first tulip bulb over from Vienna, where it had sandy soil and was highly looked upon--causing a massive need and want for them!