I built large farms of most of the useful produce. I harvested them all for some time, but it is just too time consuming to farm them constantly and at this point I no longer farm them, but I do have a stock pile of roughly 30k starberries and exotic earthyams at this point.
The issue isn’t really with the harvesting, it is with the planting. You can harvest using a 3x3 hammer and fairly quickly harvest. But then you have to plow your fields again (for certain crops this is pretty much a requirement, for others this can be bypassed), and then you must individually plant every single seed. Even with a character focused on planting speed it just takes too long to replant everything. It would likely take me several hours to go through every one of my farms and if I spend all of my time doing that, I can’t do the other things I enjoy in the game, as all of my time ends up being used to farm.
So all said and done it is just too time consuming to really focus on it due to the replanting mechanism.