So when I garden, I have to take care of one plant at a time. It would be wayyyyyy easier if we could tend more plants at once. So could you make it so we can tend more than 1 plant at a time? It's annoying that we have to wait for the gardening spell to completely finish before moving on to the next plant.
Once you have advanced to a high enough level in gardening, group compatable plants closely together, you can then use one of the higher level gardening spells to care for more than one at a time. Yes, it does take more pet energy, but it can save you time/energy.
Actually, this is already available. You just have to get to Krokotopia first. There, you can get spells to tend to three or four plants at a time. Then in Mooshu, you can get spells that cover a very large area.
Now for the "waiting for one gardening spell to finish" comment, I sort of agree with this, although I see why it is so. It is true that it gets kind of annoying having to wait for a spell to end before you can cast another, but it could also be aggravating to the eye to have multiple of those animations going on at once. So, I'm not sure which option I support right now.