Generic Clear Plastic Liners for Wood Boxes & 20" Planters — 19.5" x 3" x 3.75", Pack of 12, Waterproof

These clear plastic liners form a waterproof barrier that protects wood boxes and 20" planters from soil, moisture, and staining while keeping the pot interior tidy.

Use these transparent liners when you want to convert a decorative wooden box or standard 20" planter into a plant-ready container without damaging the wood or creating leaks. Sold in a convenient pack of 12, each liner slips inside the planter to contain soil and water, cutting down on mess and making seasonal swaps fast and clean. The liners are made of clear plastic and are sized to fit most standard 20" planters by providing a close interior fit.

How does this liner protect wood planters?

The liner creates a physical barrier between soil/water and the planter material so moisture and residue stay inside the plastic instead of seeping into wood or staining finishes. Because the liners are transparent, you can see soil levels and check for buildup without removing them.

• Prevents direct soil contact with wood, reducing rot and staining.
• Contains water and fertilizers, protecting surfaces beneath planters.
• Clear plastic allows for visual inspection of soil and moisture.

Will these liners fit my planter and how are they sized?

The listed liner dimensions are slightly smaller than planter openings to ensure they slip into standard planters easily and sit snugly. This product is sized to fit a typical 20" planter with an approximate liner opening of 19.5" x 3" x 3.75"; double-check your planter's interior dimensions before purchase for the best fit.

• Pack includes 12 liners — ideal for multiple containers or repeat projects.
• Each liner measures roughly 19.5" long with a 3" by 3.75" depth opening.
• Liners are slightly undersized on purpose for an easy insert and secure positioning.

Do the liners have drainage holes and how should I use them?

These clear plastic liners are sold without drainage holes to give you control over watering and drainage decisions. You can use them as a watertight reservoir, add holes with a heated nail or drill if you prefer drainage, or pair them with a layer of gravel for aeration.

• No factory drainage holes — modify as needed for your plant type.
• Works well as a waterproof insert for indoor displays or patios.
• Combine with liner trays or saucers to collect overflow when used without holes.

How do these liners simplify planting and maintenance?

They make potting, swapping plants, and seasonal changes quicker and cleaner by keeping soil contained and reducing cleanup time. Because they’re clear and reusable, you can repurpose liners across different planters and projects.

• Speeds up plant changes and reduces soil spillage.
• Reusable for multiple seasons if cleaned and stored properly.
• Transparent material helps monitor soil condition without removal.

Who is this for: These clear plastic liners suit gardeners, decorators, and crafters who use wooden boxes or 20" planters and want a clean, protective solution for indoor or outdoor displays. They’re practical for plant shops, landscapers staging planters, homeowners who want low-maintenance container gardening, and anyone converting decorative pots into functional planting containers. If you need waterproof protection, easy plant swaps, and a discreet, reusable liner sold in bulk, this 12-piece set is designed for you.