Rhazien is an NPC farmer on the southern part of Etceteria. He will look after the bush patch for you, for a small fee. He will not look after Poison ivy bushes though, because they cannot be diseased.
His name is a pun on the word "Raisin".
Rhazien also sells basic farming tools, which can be accessed by talking to him and asking Can you sell me something? It is not an actual shop and it has no set stock; each item has to be bought individually through the dialogue.