I'm trying to mod in some extra plants but I'm a little confused by growths. Things like plump helmets are relatively easy to figure out, since it's just a single plant that you pull out of the ground and do stuff to, but I'm trying to make a plant with fruit and leaves. Ideally, the fruit would be gathered while leaving the plant itself in the ground, and then the plant could be collected later and processed to produce leaves. The fruit could be for drinks and seeds for re-planting, but if you didn't need the leaves, you could just leave the plant in the farm plot where it was growing.
It's kinda working now; my farmers are planting the crop fine and then, sometime later, I end up with fruits, leaves, and plants. I'm just confused a bit as to how they're getting all that stuff. They're either picking the fruit up from the ground where it falls or somehow harvesting it with the plant, I guess? And I have no idea where they're getting the leaves, since they aren't set to fall off and I don't even have a farmer's workshop set up to process them to a bag.
Anyway! My question is: How does gathering plants work? Do herbalists always pick the plant as well as the fruit? Is there a way to determine that, and/or does it change based on whether or not a plant is in a farm plot? I've looked at a few of the berries and things in the RAWs but I'm still kind of lost.