aka: Poor man’s weatherglass, Sea belt Sweet kombu, Sugar tang
Habitat: Starting from the mean low tide mark downwards, attached to rock, boulders and large stones, often in gullies.
Identification: Very distinctive elongated crenulated ribbons, reminiscent of a long, frilly feather boa. Up to 4m in length with a short, narrow cord and holdfast at the base.
Ecology: Sugar kelp takes 2 to 4 years to reach full size, becoming fertile between 8 to 15 months. Like other large kelps , it provides important food and habitat for other marine algae and creatures as well as sequestering carbon and reducing coastal erosion.
Edible Uses: Sugar kelp is closely related to Saccharina japonica, the (farmed) seaweed basis of nearly all Japanese dashi, and can be used in similar ways – adding umami to soups, stews and stocks. However, dried dulse and laver exude more glutamates by weight than sugar kelp (read an in-depth study into this here). As they are better eating as vegetables too, I recommend using them in soups and stews, though there is no harm in adding sugar kelp to the pot in the same way as you might add bay leaves. It contains mannitol, a naturally occurring sugar that will add sweetness. Deep fried sugar kelp make excellent crisps, though I recommend a least partially drying it first to avoid dangerous fat-spitting! Younger, thinner fronds make great fat-free crisps – just fully dehydrate and lightly toast in the oven or a dry frying pan before serving.
Sustainable Harvesting: Spring to Autumn, cutting no more than 1/3rd from each frond and moving your harvesting around as well as rotating harvesting locations from year to year.