I grew Black Mustard as a green manure in my veg plot- early Spring it was covered in the brightest sulphur yellow flowers that were absolutely covered with pollinators so much so you could hardly see the blooms - well needless to say it ended up staying in there far longer than it should have as it was one of the best pollinator plants in my garden- Im now going to sow the seed i dried off to recreate a patch in my wildflower meadow for early drowsy hungry bees in Spring The young leaf was also nice as an addition to salads - nice and peppery as you can imagine and also did improve the soil and suppress the weeds in the plot too