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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 |
| Experience | |
| Planting | 11 |
| Harvesting | 12.5 |
| Produce | |
| Crop | Grimy guam |
| 709 | |
| 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 −176 coins.
| Herb yield | Profit/loss (Grimy) | Profit/loss (Clean) | Herb yield | Profit/loss (Grimy) | Profit/loss (Clean) |
|---|---|---|---|---|---|
| 1 | 533 | 562 | 7 | 4,787 | 4,990 |
| 2 | 1,242 | 1,300 | 8 | 5,496 | 5,728 |
| 3 | 1,951 | 2,038 | 9 | 6,205 | 6,466 |
| 4 | 2,660 | 2,776 | 10 | 6,914 | 7,204 |
| 5 | 3,369 | 3,514 | 11 | 7,623 | 7,942 |
| 6 | 4,078 | 4,252 | 12 | 8,332 | 8,680 |
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. | 
|
Disassembly
| Disassembly XP | 0.2 |
|---|---|
| Item quantity required | 1 |
| Material count | 1 |
| Base junk chance | 90.1% |
| Possible materials | |
| Often | |
 Organic parts | 99% |
| Rarely | |
 Living components | 1% |
Dropping monsters
- This list was created dynamically. For help, see the FAQ.
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- For an exhaustive list of all known sources for this item, see here.
| Source | Combat level | Quantity | Rarity |
|---|---|---|---|
| Giant ant soldier | 70 | 1 | Common |
| Ice troll female | 68 | 1 | Common |
| Mountain troll | 75 | 1 | Common |
| Undead troll | 77; 81; 86; 95 | 1 | Common |
| Wallasalki | 79; 84; 91 | 1 | Common |
| Farmer | 7 | 1 | Rare |
| Gnoeals | 70 | 1 | Rare |
| Mogre | 54 | 1 | Rare |
| Thrower Troll | 77 | 1 | Rare |
| Giant rock crab | 95 | 1 | Uncommon |
| Master Farmer | N/A | 1 | Uncommon |
| Sea Snake Young | 63 | 1 | Uncommon |
| Skeleton fremennik | 23; 28; 30 | 1 | Uncommon |
| Giant Sea Snake | 63 | 1 | Unknown |
| Troll spectator | 65 | 1 | Unknown |
| Magical chest | N/A | 3–10 | Varies |
