Kelp is used in all kinds of magic, from weather craft to medicines to gardening. Sometimes folks use it instead of rope or twine when they make any kind of magical tool or equipment, and some folks weave it into baskets for storing suitable ingredients.
We grow it special in the loch, where the waters are clean and cool. Kelp seems to like that. And ours gets a boost from the loch’s spirit, too, a serpent like creature that hides in the stems, playing peekaboo with children on the shore.