18gp
35gp
-17gp
-17gp
—
—
Price history
1 points · hover for detail
Volume · units traded
- 30D low
- 18
- 30D high
- 35
- Volatility
- 64.2%
Flip calculator
Includes the 2% Grand Exchange tax
-17gp
-17 per item · -48.57% ROI
Tax puts break-even at 35 gp.
- Capital required
- 35 gp
- Gross revenue
- 18 gp
- GE tax (2%, 0/item)
- − 0 gp
- Break-even sell
- 35 gp
Item data
- High alchemy
- 1 gp94.4% below market
- Low alchemy
- 1 gp
- Shop value
- 1 gp
- Weight
- 0 kg
- Skill / type
- Farming
- Stack / note
- Stackable · not noteable
- Released
- Jun 6, 2005
About Guam seed
The Guam seed is a members-only Herblore supply in Old School RuneScape.
"A guam seed - plant in a herb patch"
Over the last 30 days it traded between 4 and 54 gp on the Grand Exchange, averaging 18 gp. About 22,403 units changed hands per day. The price is up 315.4% across that window. The Grand Exchange buy limit is 600 every 4 hours.
Casting High Level Alchemy returns 1 gp, which is 94.4% below the 30-day average price, so alching a bought one loses money.
How to get Guam seed
11 monsters drop Guam seed, most commonly Seed pack (2/60), Master Farmer (1/58.36) and Martin the Master Gardener (1/65.1).
Dropped by
| Monster | Rarity | Quantity |
|---|---|---|
| Seed pack | 2/60 | 3–5 |
| Master Farmer | 1/58.36 | 1 |
| Martin the Master Gardener | 1/65.1 | 1 |
| Obor | 1/517 | 1 |
| Black Knight Titan | 1/555 | 1 |
| Vyrewatch | 1/6,562 | 1 |
| Skeleton (Lucien's camp) | 1/10,312 | 1 |
| Skeleton (Shayzien Crypts) | 1/10,312 | 1 |
| Zombie (Shayzien Crypts) | 1/10,312 | 1 |
| Flowering Tree (Forestry event) | Uncommon | 1–6 |
| Wise Old Man tasks | Uncommon | 1 |
Guam seed price history
Daily averages rolled up per month, newest first.
| Month | Average | Low | High | Volume |
|---|---|---|---|---|
| October 202612d | 26 | 12 | 54 | 323,951 |
| September 2026 | 15 | 4 | 26 | 559,330 |
| August 2026 | 14 | 7 | 30 | 578,134 |
| July 2026 | 19 | 11 | 42 | 693,465 |
| June 202621d | 23 | 16 | 44 | 312,259 |
| May 20262d | 39 | 9 | 68 | 29,516 |
| April 20261d | 9 | 9 | 9 | 6,740 |
| March 2026 | 13 | 5 | 17 | 144,578 |
| February 2026 | 22 | 10 | 32 | 34,709 |
| January 2026 | 12 | 2 | 30 | 17,834 |
Across 10 months of recorded prices Guam seed ranged from 2 gp in January 2026 to 68 gp in May 2026, measured over 218 trading days.
The 30-day average of 18 gp sits in the lower third of that range.
All prices in gp. Volume counts units traded across both sides of the Grand Exchange.
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