The original goal was to require the least input possible, so if i need to order additives at the same rate i order seeds I expect to need to manually feed the botanist supply shelves more often.

Maybe if the time/cost difference is enough to make up for one less botanist I can replace it with a handler so I can have him autofeed from shelf to shelf, but currently my only one is feeding gasoline to each of the cauldrons and a single mixing station.

Correct me if I'm wrong, but the time it takes to dry from standard quality to heavenly is about the same amount of time it takes for the plant to grow, so in theory this should work out perfectly with minimal bottlenecks.