Danish Seaweed
Seeded lines · grown to order · across Europe

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.

10+ years
of seaweed experience
5+ projects
running right now
8+ species
grown successfully
State-of-the-art
hatchery
Choose your seaweed

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