Yes—you can absolutely garden in a rental without committing to a heavy, permanent planter. For someone who rents and moves often, the best lightweight urban planter box is usually a fabric grow-bag style planter box or a collapsible modular plastic planter. These are designed to be lifted, emptied, folded, or taken apart, unlike ceramic, concrete, or thick timber boxes that are awkward to move.
Look for a planter box with reinforced handles, a fold-flat or snap-apart design, UV-resistant fabric or recycled polypropylene, and a removable drainage tray or saucer. A size around 10–20 gallons is usually the sweet spot for a balcony or small patio: big enough for herbs, greens, or a compact tomato, but still manageable when you need to carry it. Smaller individual planters are often easier to move than one long trough.
For a balcony or patio, a fabric planter box with sturdy handles is a practical choice. It is light, breathable, and folds down when empty. Choose one with a removable saucer so you can protect the rental floor or balcony surface. If you prefer a more boxy look, a modular plastic planter that clicks together and pulls apart is a good alternative. Avoid heavy self-watering reservoirs unless they can be removed, and skip casters if they add bulk—simple handles are often more useful for moving.
The soil matters as much as the planter. Use a lightweight potting mix with coco coir and perlite instead of heavy garden soil. This keeps the whole setup easier to lift and makes it simpler to refresh or empty before a move. Keep the planter freestanding so you do not need to drill into rental walls or railings, and check your building’s balcony rules before you buy.
My pick: a 10–15 gallon fabric planter box with handles and a removable drainage saucer. If you want a cleaner, more structured look, choose a collapsible modular polypropylene planter. Both let you grow plants now and move later without hiring a truck just for a pot.