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This article is about the common seaweed. For the item found during the quest Hunt for Red Raktuber, see Seaweed (Hunt for Red Raktuber).
Seaweed detail.png

Seaweed is a key ingredient in making molten glass, although it must first be cooked into soda ash if the player is not using the Lunar spell Superglass Make. Using seaweed on a range or fire yields soda ash, giving 1 Cooking experience per seaweed cooked. If a dwarven army axe is either wielded or in the player's inventory, cooking seaweed instead yields 4 total experience points each. A pestle and mortar can be used on seaweed to create ground seaweed, which is only used for making fish food, and awards the player with 1 Cooking experience.

Obtaining seaweed[edit | edit source]

For free[edit | edit source]

Seaweed can be found in several places, along shorelines and sometimes rivers. Some locations are:

  • Karamja. The western and eastern shores of the central part of the island have seaweed, as does the northern shore of east Karamja (south of Musa Point). The north bank of the river flowing through Shilo Village has 3 seaweed.
  • Entrana. 20 total: 9 east of the chicken pen, 6 north of the Law Altar, and 5 south-west of the sand pit and farming patch (Weapons and armour cannot be taken to Entrana.)
  • Northern Fremennik Province, in the Rock Crab area north-west of the entrance to Keldagrim. This area has 9 seaweed spawns and is recommended. With a full inventory of seaweed nets, one can make a rather large profit. Players can use the cave to go to Keldagrim and bank there, or access the bank at Zanaris using Fairy ring DKS. (Players must complete at least part of the quest A Fairy Tale Part II to have full access to the fairy rings.) Players can use the Rellekka lodestone to teleport fairly close. 
  • North-eastern corner in Piscatoris Fishing Colony. There are two nets with seaweed.
  • Seaweed can be harvested every 24 hours from an Aquarium in your Player-owned house.
  • Seaweed can also be collected over time using a granite crab familiar.

By fishing[edit | edit source]

Players may acquire seaweed by catching it in a big net while fishing at a net fishing spot. This will also give 1 experience.

The Superglass Make lunar spell allows players to use either seaweed, OR soda ash to make molten glass. So if the spell is used, there is no need to burn the seaweed into soda ash.

Ten seaweed can be stored in a Seaweed net.

Making Money Using Seaweed[edit | edit source]

Seaweed can be used to make money, although this is less common as of 2015 due to the fall in price over the last few years. Examples would include:

  • Buying 80 Seaweed a day at Catherby from Arhein for 2gp each and selling them in the G.E. for a total profit of 1,120. This will usually sell quickly on the Grand Exchange.
  • Buying Seaweed from the Grand Exchange, cooking it into soda ash and selling it yields a profit of -11 coins each.
  • Catching Seaweed using a Big fishing net in certain fishing spots around RuneScape that are close to a bank, such as Catherby.
  • After completing Deadliest Catch, Fisherman Jones will reward you with several deposit chests; one of which is located south of the Karamja lodestone. If walking isn't an issue this chest can be used to collect seaweed for an indefinite period of time.

Store locations[edit | edit source]

This list was created dynamically. For help, see the FAQ.
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SellerLocationCostCurrencyBase stockMembers?
Trader Stan's Trading PostPorts with charter ships2Coins 2.png Coins0P2P icon.png

Drop sources[edit | edit source]

This list was created dynamically. For help, see the FAQ.
To force an update of this list, click here.
For an exhaustive list of all known sources for this item, see here (include RDT).
Aquanite95 Multicombat.png(noted)18/128P2P icon.png
Aquanite (elite)104 Multicombat.png(noted)CommonP2P icon.png
Baby impling17 Hunter-icon.png1RareP2P icon.png
Baby impling jarN/A Reward1RareP2P icon.png
Dagannoth (Lighthouse)77; 78 Multicombat.png10 (noted)CommonP2P icon.png
Dagannoth (Waterbirth Island, ranged)78; 79 Multicombat.png4–10CommonP2P icon.png
Giant lobster40; 70 Multicombat.png1UncommonP2P icon.png
Ice troll female68 Multicombat.png4–10 (noted)CommonP2P icon.png
Ice troll grunt68 Multicombat.png3–7 (noted)UncommonP2P icon.png
Ice troll male68 Multicombat.png10 (noted)CommonP2P icon.png
Ice troll runt53 Multicombat.png4–10 (noted)UncommonP2P icon.png
Icefiend (Ghorrock)107 Multicombat.png(noted)CommonP2P icon.png
Mogre54 Multicombat.png1RareP2P icon.png
Mogre54 Multicombat.png4–8 (noted)UncommonP2P icon.png
Rock Crab71 Multicombat.png1–5 (noted)CommonP2P icon.png
Rock lobster100 Multicombat.png4CommonP2P icon.png
Sea Snake Hatchling63 Multicombat.png4; 5UncommonP2P icon.png
Sea Snake Young63 Multicombat.png5UncommonP2P icon.png
Waterfiend102; 107 Multicombat.png(noted)18/128P2P icon.png
Waterfiend (elite)111 Multicombat.png(noted)CommonP2P icon.png

Disassembly[edit | edit source]

Update history[edit | edit source]

The update history project is a work-in-progress – not all updates to this topic may be covered below. See here for how to help out!
  • patch 25 February 2009 (Update):
    • The reset time for collecting pineapples and seaweed from Arhein will no longer slowly creep forward.