Well it is really so … you plant the seed and forget about it.

Why ? Because you are a Warrior-King. You have Thralls to look after your crops.
And do notice: I’m not sayint we should have a mechanic about thralls looking after your crops … I’m saying they can be left alone (and we can pretend we have thralls looking after them).

Now I’m not sure how deep we want to focus on this mechanic, but … risk versus reward ?
I hardly see any risk in planting a seed, and I hardly see any reward considering how useful those plants are.

I would just expand the system a little, offering alternatives to planters (like it has been said crop fields) and maybe removing the need to use compost (which should be a booster or a fuel, not an ingredient). Maybe it can be furtherly expanded with Farmer Thralls or whatever… but not really needed.

That’s it.

Mechanic just need some minor improvements for variety and system overall…