When you order planter boxes directly from a planter box factory, the liner is not always included. In many cases, the box is made as the outer planter structure, while the liner is treated as an optional accessory. Some factories do include a basic liner with certain models, but many sell the liner separately. The answer depends on the factory, the product specification, and the terms of your order.

If you are buying wholesale or custom planter boxes, never assume a liner is part of the price. Check the quotation, product description, or sample details carefully. Look for phrases such as “liner included,” “optional liner,” or “liner sold separately.” If the information is unclear, ask the supplier directly:

- Does the quoted price include a liner?

- What type of liner is available: plastic, fabric, coconut coir, or metal?

- Is the liner removable and replaceable?

- Does it have drainage holes or a water reservoir?

- How much does the liner cost if purchased separately?

Factories often sell liners separately because different buyers need different features. A liner can protect wood or metal from wet soil, reduce rot and corrosion, improve drainage, and keep the planter cleaner. Some customers prefer to use their own pots, grow bags, or custom inserts, so a separate liner gives them more flexibility. Selling liners separately also allows the factory to keep the base planter box price lower.

For outdoor wooden planter boxes, a liner is usually recommended. Without one, constant moisture can cause warping, staining, and rot. For metal planters, a liner can reduce heat transfer and corrosion. For self-watering designs, the liner or reservoir may be built into the box. That is why two planter boxes from the same factory can have very different liner arrangements.

If you need a liner, put it in the order specification. Confirm the material, thickness, UV resistance, dimensions, and drainage design. Ask whether the liner is covered by a warranty. If it is sold separately, compare the factory’s liner price with local options. Sometimes the factory liner fits better; sometimes a local liner is cheaper.

In short, planter box factory boxes may or may not come with a liner. Some include it, many do not, and it is often sold separately. Always confirm the exact specification before you order. If the liner matters for your project, treat it as a required line item, not an assumption.