Yellow Mustard - 12,500 Seeds - Wonderful Field Flower, Vineyards, Nitrogen Fixing Cover Crop 1/8 Pound of Wild Mustard Seed: A Great Field Flower - Annual Flowering Plant and Self Seeds Good Cover crop. Dig into Soil if Desired as it is a Nitrogen Fixing Plant. Yellow flowers will begin to bloom within 6 weeks attracting a large number of beneficial insect species. Grows quickly and reliably. Used widely in Wine Country Vineyards. Marde Ross has been a Licensed California Nursery since 1985