Long planters are made from a range of materials, including plastics (polypropylene/PP, polyethylene/poly-wicker), metals (electro‑coated metal, galvanized steel, iron), and natural wood (fir). Some models combine materials (for example, metal frames with polypropylene liners).
All three options are available: some long planters are intended for outdoor use, some for indoor use, and several designs are sold as suitable for both indoor and outdoor placement. Check the product listing for explicit indoor/outdoor suitability and any notes about drainage or liners for indoor use.
Drainage options vary by model and include: single drainage holes, multiple drainage holes, water‑permeable bases, and models sold without drainage holes. Some vertical planters use detachable trays so you can switch between drainage and water retention.
Options include removable inner planters or polypropylene liners, detachable trays for vertical boxes, and removable planter boxes that make soil changes and cleaning easier. Some tall planters include liners with no drainage holes specifically for indoor use—verify the included liner and drainage configuration in the product details.