Dantaera is the farmer of the allotment patches in Catherby. She is a member of the Group of Advanced Gardeners. Dantaera is needed in the Garden of Tranquillity quest.
She will look after your crops for payment. She will only look after the north and south patch, not the flower or herb patch.
Dantaera also sells basic farming tools, which can be accessed by talking to her and asking "Can you sell me something?" There is no shop interface, and it has no set stock; each item has to be bought individually through the dialogue.