Guam seed
 File:Herb seed 2.png File:Herb seed 3.png File:Herb seed 4.png 
| |
| Farming level | 9 |
|---|---|
| Patch | Herb |
| Time | 80 min (4x20 min) |
| Planting XP | 11 |
| Checking XP | N/A |
| Harvesting XP | 22.5 |
| Payment | N/A |
| Tradeable? | Yes |
| Stacks? | Yes |
| High Alchemy | 2 coins |
| Low Alchemy | 1 coins |
| Store price | Not sold |
| Exchange price | Expression error: Unrecognized punctuation character "[". coins (update) |
| GE Database | Look up price |
| Examine | A guam seed - plant in a herb patch. |
| Weight | 0 kg |
| Look up price info File:GEMH (blank).png Click to enlarge | |
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.
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 
−5 coins.
| Herb yield | Profit/loss | Herb yield | Profit/loss |
| 1 |  516
|
6 |  3,121
|
| 2 | 1,037
|
7 | 3,642
|
| 3 | 1,558
|
8 | 4,163
|
| 4 | 2,079
|
9 | 4,684
|
| 5 | 2,600
|
10 | 5,205
|
Note: Supercompost yields a minimum of 5 herbs.
| Stage | Description | Image |
|---|---|---|
| Healthy Guam plant | ||
| 1 | The seed has only just been planted. | 
|
| 2 | The herb is now ankle height. | 
|
| 3 | The herb is now knee height. | 
|
| 4 | The herb is now mid-thigh height. | 
|
| 5 | The herb is fully grown and ready to harvest. | 
|
Dropping monsters
Levels 1 to 74
Monster Combat level Quantity Rarity Mountain troll 69, 71 1 Common Mogre 60 1 Rare Ice warrior 57 1 Unknown Skeleton Fremennik 40, 50, 60 1 Unknown Troll spectator 71 1 Unknown Undead troll 74, 100, 125 1 Unknown
Levels 75 and above
Monster Combat level Quantity Rarity Ice troll female 82 1 Common Sea snake young 90 1 Uncommon Gnoeals 84, 93 1 Rare Giant Rock Crab 137 1 Unknown Giant Sea Snake 149 1 Unknown Undead troll 74, 100, 125 1 Unknown Wallasalki 98 1 Common
.png){kind=small}
.png){kind=small}
.png){kind=link}