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Guam seed

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Herb seed detail

Guam seeds can be planted in a herb patch in order to produce grimy guams. This requires a Farming level of 9.

A nearby gardener will not watch over your growing guam.

Grimy guams are the fourth cheapest herbs in RuneScape. Supercompost or Fertile Soil spell is strongly advised against, as although this is the best way of preventing your herbs from getting disease, and it is not possible to water the patch, or ask a farmer to tend the herbs, they both cost more than the maximum yield of herbs.

Guam seeds may be bought from the Vinesweeper minigame for 10 points each.

Guam seed
Farming level 9
Patch Herb
Payment N/A
Time 80 minutes (4x20 minutes)
Seeds per 1 seed
Planting 11
Harvesting 12.5
Crop Grimy guam
Yield[?] Unknown edit

The following table shows the profit yield, assuming all the herbs and seeds are purchased/sold at the Grand Exchange, for the guide price. If the herb dies, you will lose -12 coins.

Herb yield Profit/loss (Grimy) Profit/loss (Clean) Herb yield Profit/loss (Grimy) Profit/loss (Clean)
1 65 93 7 527 723
2 142 198 8 604 828
3 219 303 9 681 933
4 296 408 10 758 1,038
5 373 513 11 835 1,143
6 450 618 12 912 1,248

Note: Supercompost yields a minimum of 5 herbs.

Stage Description Image
Healthy Guam plant
1 The seed has only just been planted. GreenHerb1
2 The herb is now ankle height. GreenHerb2
3 The herb is now knee height. GreenHerb3
4 The herb is now mid-thigh height. GreenHerb4
5 The herb is fully grown and ready to harvest. GreenHerb5


[FAQ] • [doc]

Dropping monstersEdit

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To force an update of this list, click here.
For an exhaustive list of all known sources for this item, see here.
Source Combat level Quantity Rarity
Giant Sea Snake631Unknown
Giant ant soldier701Common
Giant rock crab951Uncommon
Ice troll female681Common
Magical chestN/A3–10Varies
Master FarmerN/A1Common
Mountain troll751Common
Sea Snake Young631Uncommon
Skeleton fremennik23; 28; 301Uncommon
Thrower Troll771Rare
Troll spectator651Unknown
Undead troll77; 81; 86; 951Common
Wallasalki 79; 84; 911Common

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