OAKENZ Square Planter Box Liner – Waterproof, UV-Resistant 16 Inch Insert for Wood & More

Upgrade your square planter with a purpose-built liner

The OAKENZ Square Planter Box Liner creates a clean, uniform interior for medium-sized square planters. Compatible with wood, concrete, resin, plastic, composite, and metal boxes, it helps define a tidy planting space while reducing direct soil contact with the planter walls.

Crafted from plant-safe, non-toxic materials and designed to stay sturdy in outdoor conditions, this liner acts as a simple moisture barrier. It supports soil moisture retention and can help your plants thrive by promoting even rooting environments, without altering the exterior look of your planter.

Key benefits at a glance

• Fits square planter boxes up to 18 x 18 inches (500 mm), with a flexible edge that presses neatly into corners for a clean, custom fit.
• Plant-Safe, Non-Toxic Materials designed for vegetables, herbs, flowers, and ornamentals, with recyclability in mind.
• Moisture Barrier that helps retain soil moisture while limiting direct soil contact with planter walls, supporting healthier root zones.
• Quick, Clean Installation that’s trimmed to your chosen height and pressed into place for a tidy interior.

Outdoor-ready design and versatility

• UV-Resistant and NZ-Made, built to endure sun, rain, and seasonal changes while maintaining performance.
• Designed for Planters Only: ideal for square planter boxes and raised beds; not intended for ponds or water features.
• Upgrade potential with OAKENZ Corner Feet to improve drainage, airflow, and surface protection around decks and patios.

Real-world use and setup tips

Use the liner to create a consistent planting area in diverse planter materials, then trim to the exact height to suit your box. If your setup calls for drainage, you can add holes in the base as needed. Note that height adjustments may be required depending on your planter box profile.

With its durable construction and easy fit, the liner offers a cleaner, plant-friendly way to prepare any large square planter box, helping you optimize moisture retention and simplify maintenance across seasons.