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.
Guam seeds may be bought from the
Vinesweeper minigame for 10 points each, by pickpocketing Farmers and Master Farmers, as a drop from various monsters, and from Managing Miscellania.
When planting a Guam seed, it is recommended to use any type of
compost in order to maximise potential yield and to reduce the chances of the patch becoming diseased and dying.
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 -20 coins. Using Supercompost yields a minimum of 5 herbs and maximises profit.
Growth Stage Edit
Healthy Guam plant
The seed has only just been planted.
The herb is now ankle height.
The herb is now knee height.
The herb is now mid-thigh height.
The herb is fully grown and ready to harvest.
Drop sources Edit
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For an exhaustive list of all known sources for this item, see