Be careful not to over-water plants in the greenhouse or indoors as their growth slows down with shorter and cooler days. Water thoroughly, then allow most plants to dry out before watering again.
Provide humidity for citrus and other sub-tropical plants growing indoors.
Outside, most locations will receive enough rainfall. If you are in a drier location check the soil once a week, apply water to new plants as needed to keep the soil evenly moist.