Choosing the right liner for metal planters helps protect the metal, manage moisture, and support robust root growth. The following selections are durable coco fiber liners and related options that fit a variety of metal containers—from troughs and window boxes to hanging baskets. Each product includes natural materials, good drainage, and easy customization to fit shapes and sizes. Read on to compare options and find the best liner for your greenery.
| Product | Brand | Size | Material | Best Use |
|---|---|---|---|---|
| SUNYAY 12×40 Inch Coco Liner Roll | SUNYAY | 12×40 inch / 30×100 cm | 100% natural coconut coir | Planter liners, window boxes, baskets |
| Sinimaka Coco Liner Roll 16×40 Inch | Sinimaka | 16×40 inch | Coconut fiber | Planters, window boxes, hanging baskets |
| HHTHH 2pcs Trough Coco Liner | HHTHH | 24 inch length | 100% coconut fiber | Window boxes, trough planters |
| Niuyhe Fabric Raised Bed Liner | Niuyhe | Standard fabric liner for 269 gallon bed | 260g/m² non-woven fabric | Metal raised beds, general planters |
| O-FarFarm 4 Packs Coco Liners 36 Inch | O-FarFarm | 36 inch length | Coconut fiber | Window boxes, outdoor planters |
Note: All products are designed to fit a range of metal planters, with natural materials that promote drainage and aeration. The choices vary in shape (rolls, sheets, troughs) and size to cover standard troughs, window boxes, and hanging baskets. Review the individual specs to determine fit for your exact container dimensions and climate needs.
SUNYAY 12×40 Inch Coco Liner Roll

The SUNYAY liner is a thick roll of 100% natural coconut coir fibers, designed for eco-friendly use in planters and baskets. With a size of 12×40 inches, the liner ships as a roll and can be cut to fit irregular shapes. This versatility supports liners for window boxes, hanging baskets, and even pet pads or weed mats in garden décor. It emphasizes natural materials and breathable structure to help maintain soil moisture while preventing soil loss.
Sinimaka Coco Liner Roll 16×40 Inch

Sinimaka offers a natural coconut fiber liner roll at 16×40 inches. The liners are claimed to be biodegradable and eco-friendly, with ample drainage holes for proper water retention and air circulation. The liner is easy to cut for various container shapes, facilitating DIY projects. It works well for odd-shaped wire planters, window boxes, hanging baskets, and window box liners. Beyond aesthetics, it helps reduce soil loss and supports moisture retention for healthier plant growth.
HHTHH 2pcs Trough Coco Liner 24 Inch

HHTHH provides a trough-shaped coconut liner, sized at 24 inches in length with an 7-inch width and depth. Made from 100% natural coconut fiber, these pre-formed liners are designed for easy securing in window boxes or trough planters. They are suitable for a variety of flowering plants and can simplify installation by delivering a ready-to-use solution that reduces soil loss and improves moisture management in metal containers.
Niuyhe Fabric Raised Bed Liner

Niuyhe presents a fabric liner designed for metal raised beds, emphasizing durability and reusability. Made from 260 g/m² elastic non-woven fabric, it offers puncture resistance and supports breathable growth environments by promoting air circulation and drainage. This liner can be used as a standalone planting bag or as a liner in metal beds, helping roots settle in while maintaining soil moisture and temperature balance for robust plant development.
O-FarFarm 4 Packs Coco Liners 36 Inch

O-FarFarm offers four 36-inch coco liners, designed to fit window boxes and trough planters. The liners are made from natural coconut fiber and are positioned as an eco-friendly alternative to plastic or metal liners. They highlight sustainable credentials and good drainage properties, which help prevent overwatering and root rot while ensuring plants receive sufficient aeration for healthy growth.
Karlliu 4 Pack 24 Inch Trough Coco Liners

Karlliu provides four 24-inch trough liners crafted from natural coconut fiber. The liners promise excellent breathability and water retention, helping keep soil moist and promoting healthy growth. This option suits deck boxes, window boxes, porch planters, and other outdoor or indoor containers. Their versatility extends to use in hanging baskets or as a base for plant arrangements, making them a flexible choice for various metal planter setups.
ZeeDix 14 Inch Hanging Baskets With Coco Liners

ZeeDix offers two 14-inch hanging baskets with coco coir liners, designed for indoor or outdoor use. The liners measure 14 inches in diameter and about 6.69 inches in depth, which supports a healthy root environment. The coco liners are natural and durable, with easy cutting to fit metal frames and a sturdy iron frame with a powder-coated finish to resist rust. These baskets balance aesthetics with practical moisture management for hanging setups.
Buying Guide: Key Purchase Considerations
- Material and sustainability: Most liners are coconut coir, a renewable resource. Look for 100% natural fibers for biodegradability and reduced plastic use.
- Container compatibility: Check liner dimensions against your metal planter, trough, window box, or hanging basket. Some products are roll-based, others are pre-formed or fabric sheets.
- Moisture management: Liners with good drainage holes or breathable fabric help prevent root rot and overwatering. Coir generally retains moisture well without waterlogging.
- Durability and reuse: Non-woven fabrics and sturdy coir liners offer longer lifespans in outdoor conditions. Reusability reduces replacement frequency and waste.
- Cutting and customization: Rolls or sheets should be easy to cut to fit irregular shapes. Pre-formed liners save time but may require trimming for precise fits.
- Environmental impact: Eco-friendly liners reduce plastic usage and support sustainable gardening practices in homes and urban spaces.
- Maintenance: Some liners clean easily or can be dried for reuse. Consider liners that resist mold or odors in humid climates.
- Aesthetics: Liner appearance matters for visible planters. Natural coco fibers provide a rustic look that complements green plantings and metal finishes.