Mustard Seed Instructions


Black Mustard (Brassica Nigra) - This annual culinary herb is well-known as the old-fashioned mustard that gave the condiment its start. Quickly grown from Mustard seeds, the Mustard plant produces herb seeds which are ground and used to spice many different foods. The mustard seeds are small, hard and vary in color from dark brown to black. Black Mustard is more powerful in flavor than yellow mustard, but it is not grown commercially due to the difficulty of harvesting with equipment because of the irregularity of plant size.

How to grow
Start Mustard seeds directly outdoors a couple of weeks before the end of frost season. Prepare a seedbed with lot of organic matter added to the soil and cover the herb seeds with 1/2 inch of soil.

  • Average Germ Time: 14 - 21 days
  • Keep moist until germination
  • Attracts bees and butterflies
  • Depth: 1/2 inch
  • Height: 24 - 72 inches
  • USDA Zones: 4 - 7
  • Season: Annual

The Black Mustard herb plant has a sturdy stalk with wrinkled, lobed, and dark green leaves. Yellow, 4-petaled flowers appear on spikes in early summer. Both the seed and the greens of this herb plant are used. The greens can be cooked or steamed, but as the summer gets hotter, the greens get stronger with a bitter taste.

Black Mustard plants are often grown in two crops during the season to keep a supply of the young greens. Black Mustard seeds come in the summer heat as the plant bolts. The plant size can vary from 24 inches to 72 inches in height, depending on the the conditions where it is growing.