Beach Mustard

Beach mustard is an aquatic herb with a salty mustard flavor and a juicy bite. You can use it in oily fish dishes and as a replacement for mustard.

  • Where to Find It

    Beach mustard is especially common in eastern Denmark. A hardy plant that can tolerate salt, wind, and intense sunlight, it grows on the beach between the water and rocks in areas where the seaweed from which it derives nutrients has washed ashore to decompose. You can find the low-growing herb by looking in and around the seaweed.

  • Salt marshes, beaches.
  • When to Find It

    From July to October, or before the first frost.

  • Leaves and flowers: July, August, September, October.
  • How to Spot It

    Beach mustard looks like puffy, greyish-green dill, and is topped with small, pink flowers. It grows in clumps on the beach, making it look like a bunch of green pillows scattered on the sand. Its stems—smooth and swollen-looking—support small, arugula-like leaves at the top. The siliques—the plant’s seeds pods—look like chilli peppers.

  • How to Pick It

    When collecting sea mustard, choose the younger, more tender, and swollen parts of the plant. The fibrous parts of larger plants are not as tasty. Be careful not to uproot the plant and pick gently so as not to damage it. Clip judiciously from each plant.

Risk of misidentifying the plant

There is no risk of mistaking the plant for another dangerous or undesirable plant.