[NEEDS INPUT] Sprinklers in greenhouse not watering some plants

Ok, so I've played a couple of weeks with a garden or 2. I've put all plants in Hydroponic planters and that has solved the dry plant problem. I would like to go back to planting on the ground though, as the planters take too much space, especially since I have a lot of trees. The plants also don't get any weeds, but will occasionally have bugs that need spraying.

Anyway, I've noticed that the Sixam plants (currently Orb Stalk and Quill plant) still have the option to "water all", even in those planters. If I click on the option, my sim will water one of the plants, but not both. I also see plants revert back to the "just planted" stage, but that's a different issue.