Tell me if this has ever happened to you: you come across a patch in your travels, season a bean for it, and then when you try to plant it, the patch nonsensically scolds you for not having a *seasoned* bean in your inventory.
First of all, you do have a seasoned bean since you just made one, so the error message is just plain wrong. Secondly, figuring out what beans are native to what regions is pure guesswork, since there is no in-game resource that tells you what grows where, so I sometimes season the wrong kind of bean for the climate. This is only going to get more confusing as more regions (and hopefully some day more trees!) are added to Ur.
So I recommend that patches, when selected, tell you what trees can be planted there. If you have the wrong kind of bean in your inventory and try to plant, please have the patches recognize that, so that instead of sneering "you need a *seasoned* bean", the patch says something like "none of the beans you have will grow here!"