Drying Dulse (Palmaria palmata) is a red seaweed that grows attached to rocks in the North Atlantic and Northwest Pacific. It is commonly used in Ireland and Atlantic Canada both medicinally and as food. Dulse is found in many health food stores. It grows from the mid tide portion of the intertidal zone into deep water. Fronds may vary from rose to reddish-purple, and range from about 20 to 40 cm (8" to 16"). Dulse is harvested from June through September. It is picked by hand at low tide and brought to drying areas. The fronds are spread thinly on netting and left to dry. Grand Manan Island, Canada is known for the best dulse in the world.