Home · Field Guide · Sugar Kelp
Sugar Kelp
One long crinkled golden blade — the kombu of the North Sea.
By Jayson Byles, forager & chef · Updated August 2026
Sugar kelp (Saccharina latissima) is a brown kelp of sheltered lower shores and deep rockpools, recognisable at a glance as one single long blade — olive to antique gold — with a crinkled, bubbled centre and frilled margins, like a strip of old fabric pulled from the sea. Dried, it develops the sweet white bloom that names it, and in the kitchen it is the closest thing the Scottish shore has to Japanese kombu.
How do you identify sugar kelp?
Three marks settle it: a single undivided blade (never splitting into fingers), the crinkled, bubbled centre line with ruffled edges, and a short flexible stipe from a small branched holdfast. Blades commonly run one to two metres in the sheltered water it prefers. Oarweed (Laminaria digitata) — the other kelp a beginner meets — is flat, smooth and splits into straps like fingers on a hand; dabberlocks carries a pale midrib that sugar kelp never has.
Where and when to find it
It favours shelter: the calmer gullies, deep pools and lowest rocks that only a spring tide uncovers — on our shore, the same windows the workshops chase. It grows fastest through winter and spring, and blades are at their cleanest and best from spring into early summer, before summer growth on the blade surface dulls them.
How to harvest it
Cut a blade well above the growing zone near the stipe — kelps grow from the base, so a high cut lets the blade regrow — and never take the holdfast. A single mature blade is a lot of kelp; one or two is a larder’s worth. Cut, never pull, as always.
How do you cook with sugar kelp?
Its great gift is stock: a strip steeped in barely-simmering water for twenty minutes gives a rounded, savoury-sweet dashi that lifts soups, risottos, and anything that welcomes umami. Fried hard it blisters into a glassy crisp; dried and ground it is a sweet-savoury seasoning for bread and bakes; and a strip in the pot with potatoes or pulses seasons them from within. Dried blades keep for a year or more — and if the garden is calling instead, kelp is also the engine of our seaweed tea.