I would love to grow herbs in game. I imagine a new addition to the greenhouse that would allow you to grow and dry herbs and flowers. Plus, you could produce tinctures using the oil maker. I think the best thing about an herb garden would be all the possible story expansions. After all, herbs have culinary, medicinal, and magical uses. Some, like wormwood, can be used all 3 ways. Maybe you could start with culinary herbs and a storyline or quest involving Gus then move on to medicinal (Harvey or Emily) and then magical ( the Wizard, obviously). I see the herb garden as more cooperative then competitive, but maybe Harvey could use a push to grow his business.