The Farm Market is a small house you can find ingame in HKO in all of the larger towns and cities: Sanrio Harbour, London, Paris and Beijing. In all of these Markets you will find a Farm Supply Merchant, who will sell you seeds, water cans and fertilizers for your farm (some may also offer farm certificates and stuff like scarecrows for your farm) and a Farm Manager, who will show you a list of farms you can go to. The Farm Manager can then transport you to your farm or farms of other players and he will also let you choose an active farm out of all farm-versions you currently own.