So I finally bought a house after months of saving with my character eating grass and living in a tent in the woods. I'm planning to plop down gardening spots when I finally have some gil again, so a couple of questions for a new gardener:

1. You... don't actually NEED to be an appropriate level botanist to grow and harvest certain crops right?
2. I'm going through google and I can't find lists of new seeds for HW. I assume HW has, as of now, not introduced new seeds right?
3. My biggest problem is that every few days I work a 30 hour shift (hospital), and the gardening guides say that you should water your garden ideally at least once every 24 hours. Am I basically going to go home to dead plants after my long shifts, or do I have some leeway?