One fixing point, no ceiling required
Plenty of rooms have nowhere overhead to screw into: a concrete slab, a rented apartment, a ceiling nobody wants to touch. Twelve designs in this group answer that by hanging off a single point on a vertical surface — a nail into a stud, a screw with a plug, a hook over a picture rail — with the pot resting close in rather than floating out over the floor. Light pieces manage on a rated adhesive hook. Anything with real mass calls for a toggle anchor, which opens behind the plasterboard and pulls against a much wider area.
Dowel bars against ring tops
The wooden dowel plant holder fans its cords out from a horizontal bar, so it sits wide and shallow and suits the space above a console or the gap between two windows. A ring-topped build such as the knotted rope holder for a flower pot stays narrow and travels further down. Measure that drop first: the inch figures given run from the hanging point to the tip of the fringe, and the pot itself sits well up from there.
Kitchens, baths and stacked pots
These earn their place where counters and sills are already occupied. Double and multiple versions stack planters up a tall, thin strip of wall that nothing else can use. Keep one clear of the spray from a shower head, and clean by spot-treating rather than soaking the whole piece. When the wall you have is dark, the window plant hangers move the pot into the brightest part of the room instead.