Growth of flora about Avalon

Herbs and poisons, as part of the flora of Avalon, will grow. For a herb or a poison to grow and multiply it must be growing in a suitable habitat. Herbs and poisons will not grow up unless there is a source to grow from - so there must be a batch of furglewort already growing for more to spring forth. Diligent gardeners may PLANT herbs and poisons. Care should be taken over this. Planting something in the wrong habitat or where there is already an over-abundance may cause the plant to die. Once prepared, herbs tend to last for around an Avalon months, or for years when inside a herb pouch.