Don't put any furniture or plants near the fireplace, or you'll end up with a pile of cinders for a home. Don't create any too-small spaces, or your Room rating will go down outside. Plant trees for shade and beauty. Plants can be planted on inclines, although if you're planting hedges, you may want to level the ground so the tops match up. Make sure you can afford that bed of nasturtium before going willy-nilly into the deal.
Plants are yet another chore.
They need to be watered every now and then. If you can't remember or can't get around to watering all your lovely plants, you can always call a gardener to do it for you. Simple access the Service panel on the phone and call for a Gardener. If you can afford plants, you can afford to have someone else care for them. Click to place a single tile of Floor in a grid space.