Q.When My Mustard Plants Start Having Flowers, Should I Remove The Flowers?
My mustard plants have a lot of flowers! Should I remove the flowers?

Certified GKH Gardening Expert
If you don't want the seeds you can remove the flowers if you are still harvesting leaves. If you are finished harvesting leaves you can just work the plants under. Here is more:
https://web.extension.illinois.edu/veggies/mustard.cfm
https://mgsantaclara.ucanr.edu/garden-help/vegetables/mustard-greens/
https://www.gardeningknowhow.com/edible/herbs/mustard/growing-mustard-seed.htm
https://www.gardeningknowhow.com/edible/herbs/mustard/mustard-seed-uses.htm