Seaweed Lines
We cultivate ready-to-deploy seeded lines for seaweed projects — red, brown and green macroalgae, raised from mother plants taken in your own waters.
Brown Algae
Phaeophyceae The kelps and wracks — fast-growing, high-yield species.Sugar Kelp
Saccharina latissima
One long, ruffled blade — sweet, high-yielding and our flagship crop.
Oarweed
Laminaria digitata
Broad blade split into finger-like straps — built for exposed sites.
Sea Lace
Chorda filum
Long, unbranched, cord-like strands — world-first rope cultivation.
Toothed Wrack
Fucus serratus
Flat, forking fronds with a midrib and saw-toothed margins.
Bladderwrack
Fucus vesiculosus
Forking fronds dotted with paired air bladders — rich in fucoidan.
Green Algae
Chlorophyta Bright, fast and tender — the fresh, vegetable end.Sea Lettuce
Ulva lactuca
Broad, translucent, ruffled sheets with a fresh, peppery bite.
Gut Weed
Ulva intestinalis
Inflated, tubular strands — crisp and bright, excellent dried.
Red Algae
Rhodophyta Prized for flavour and gelling power — the highest culinary value.Irish Moss
Chondrus crispus
Bushy, repeatedly forking fans with broad, flat tips — natural carrageen.
How we work
Every line is grown for your site
Local mother plants
We raise each batch from broodstock collected in your own waters, so the seaweed is native and adapted to your local conditions — not a strain imported from elsewhere.
Plan a season ahead
Because every line is produced to order from local material, we need lead time. Reach out well before your deployment window so we can collect, seed and grow in time.
Built for projects
Restoration, research or commercial scale-up — if you have something interesting in the pipeline, we'd like to be part of it. Bring us the idea early and we'll shape the lines around it.
Let's collaborate
Have a project in the pipeline?
Tell us your location, the species you're after and your timeline. The earlier we talk, the better — your lines are grown from mother plants sourced in your own region, and that takes a season to do right.
Start a conversation or write to hello@seaweedlines.com