Bloemenmarkt Amsterdam - Flower Market

http://amsterdamsights.com/shopping/bloemensingel.html has all the info u want

Not to overstate the case, this market is not what it once was. But it's really easy to include on a strolling self-tour. Our last visit was a bit disappointing. Too many low-end retail options, crowds, and identical stock.

You might have some interest in the wholesale auction at Aalsmeer, which you can research. It's well out of town.
https://www.royalfloraholland.com/en/about-floraholland/visit-the-flower-auction/aalsmeer/
It is in danger of becoming a "virtual" online event (I mean for business, economic, and practical reasons) at some time in future, so I would go sooner.