Rhonen is a gardener who wanders around a farming patch north-west of Seers' Village used to grow hops. Depending on what hops you are growing, you can pay him in resources to watch after your crops. Rhonen sells compost, gardening trowels, plant cures, rakes, seed dibbers, and watering cans.
Rhonen 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.