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Underwater seaweed patch runs: farming giant seaweed

Recurring Moderate Members Ironman-friendly Low liquidity Volatile Timer-limited

−13KGP/hr
28KCapital to start (~1 hour of inputs)
−4,280/dayTimer-limited: 5 runs × 4 min/day

Plant a seaweed spore with ultracompost in each of the two underwater patches, then come back about 40 minutes later to harvest the giant seaweed. Only two patches, so it is best tacked onto other Fossil Island activities.

Requirements

  • Skills: 23 Farming
  • Quests: Bone Voyage
  • Items: Fishbowl helmet, Diving apparatus
  • Note: Two seaweed patches on the seabed off Fossil Island; the Fossil Island Elite diary is not needed. Assumes a digsite pendant for travel.

How to do it

Method rates and requirements here are independently authored. For the step-by-step guide, see the OSRS Wiki page (CC BY-NC-SA 3.0).

Last 7 days

Hourly GP/hr snapshots.

The math (per hour)

ItemQty/hrUnitTotal1h volume
Giant seaweed24064+15,3603,259
limit 11,000/4h
Seaweed spore low liq30380−11,40012
limit 600/4h
Ultracompost30560−16,80016,631
limit 2,000/4h
Revenue15,360
Costs−28,200
Profit / hour−13K

Sell prices are after 2% GE tax (capped at 5M, items under 50 gp exempt). Inputs use the instant-buy price, outputs the instant-sell price — the conservative assumption. Buy-limit cap: none.

Prices updated 4 min ago. Figures are estimates: buy at instant-buy price, sell at instant-sell price after 2% GE tax.

Something wrong?

Rates, requirements or items off? Tell us and we'll fix the data.

Reports are checked automatically: when 3 people agree on a rate, the method is updated without waiting for a human. Current figure: 30 actions/hr.