I was rejected from my engagement for being incompetent at nothing but growing grass. But are you sure about this, when all the medicinal herbs used as potion ingredients in this town are ones I cultivated?

The earldom achieved economic development thanks to the potion factory. Amy is broke off her engagement by the eldest son of the count's family because she only does farmwork and does not seem like a noblewoman. It seems he does not know that apparently potions cannot be made without the high-quality medicinal herbs that Amy produces.