In the game, you can get a building called the seed maker. I've got a secret that I am going to tell you... ...so to get the seed maker, you need to harvest more than 50 crops. To do this, go to town and sell anything you don't need. When you have enough money, go and buy about 20 seeds, and plant them. Now, you might think this is a lot of work, but it works!
So anyway youve harvested over 50 crops soon, and then takakura will talk to you or you will talk to him, and he will say about a seed maker. Now you have to get 6000 gold to afford it, I suggest selling all the crops you grew at the shop site... The place between the blue bar and the inner inn.
Properties of the seed maker:
Put a crop in the seed maker, and it will make 2 sets of seeds, doubling your profits from one crop.
By darthcheater12345, who wrote this and does not appreciate being copied.