Farming/Patch locations

Flower only patch
There is a flower patch in the Wilderness that can only be used for limpwurts.

Allotment only patch
There is a single allotment patch on Harmony island. The Great Brain Robbery (quest) is needed to access. There is a leprechaun tool store but unlike other allotments no farmer to look after crops.

Potato only patch (disease free)
There is a patch used exclusively for potatoes located next to the flax field in Taverley. Head Farmer Jones trades you 3 potato seeds for free and automatically looks after your crops as a gardener, so you cannot water your patch; you can, however, use compost or supercompost to increase your harvest load. There is a leprechaun tool store next to it and there is a compost bin.

Herb only patch (disease free)
Except for the one listed below, all other herb patches are located at the above locations (allotment patches). My Arm's Big Adventure Quest Needed.