Seaweed (Farming)

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Seaweed must be grown with the Farming skill in a Seaweed patch in the underwater area of Fossil Island. It requires Farming level 23. Players can pay Mernia to protect this patch by giving her 200 numulites.

Once fully grown, which takes approximately 40 minutes, players will be able to harvest giant seaweed. A minimum of three can be collected per patch, with the average being around 15–30 (if super or ultracompost is used; 8-16 if compost is not used), depending on one's Farming level. Specifically, the patch has three "lives" by default, and each tier of compost adds one extra. The chance to not consume a life upon harvest is 64.1% at level 23 and 82% at level 99, using linear interpolation for other levels.[1] Magic secateurs and the farming cape do not have an effect.[2]

Farming info[edit | edit source]

Seaweed spore
Level required Farming 23
Patch Seaweed
Seeds per 1
Payment 200 Numulites
Growth time 40 min (4x10 min)
Yield 3+ (varies)
Regrow No
Navigation
Seed Seaweed spore 5.pngSeaweed spore
Plant Seaweed
Crop Giant seaweed.pngGiant seaweed
Experience
Planting XP 19 xp
Checking XP No
Harvesting XP 21 xp
Item Quantity Rarity Price High Alch
Giant seaweed.png: Seaweed (Farming) drops Giant seaweed with rarity Always in quantity 1Giant seaweed1Always[d 1]2121
  1. Only dropped by Grown versions.

Growth stages[edit | edit source]

StageImageDiseasedDead
1Seaweed (stage 1).pngN/AN/A
2Seaweed (stage 2).pngDiseased seaweed (stage 2).pngDead seaweed (stage 2).png
3Seaweed (stage 3).pngDiseased seaweed (stage 3).pngDead seaweed (stage 3).png
4Seaweed (stage 4).pngDiseased seaweed (stage 4).pngDead seaweed (stage 4).png
5Seaweed (grown).pngN/AN/A
  1. Jagex. Mod Ash's Twitter account. 12 October 2018. (Archived from the original on 28 May 2020.) Mod Ash: "3 [lives] as standard. Add 1-3 for the tier of compost you used. The chance scales from 59% - 82% of NOT taking a life when you get an item, as your level goes from 1-99."
  2. Jagex. Mod Ash's Twitter account. 25 June 2018. (Archived from the original on 29 May 2020.) Mod Ash: "No, doesn't look like it. I guess you weren't expected to have them equipped down there."