OAKENZ Square Planter Box Liner – Waterproof, UV-Resistant Planter Insert (Large)

Overview

The OAKENZ Large Square Planter Liner Bag creates a clean, uniform interior inside square planter boxes, across wood, concrete, resin, plastic, composite, and metal designs. At 20 in x 20 in x 18 in high (500 mm x 500 mm x 450 mm), it forms a moisture barrier that helps retain soil moisture and supports healthier plant growth while reducing direct soil contact with planter walls. Crafted from plant-safe, non-toxic materials, this liner cushions roots and makes a tidy planting space. A note: height may require trimming to fit your specific planter.

Why this liner stands out

• Clean interior, uniform planting area: the flexible material presses neatly into corners for a precise, custom fit.
• Plant-safe construction: durable, recyclable materials suitable for vegetables, herbs, flowers, and ornamentals.
• Moisture management: forms a barrier that helps retain moisture and reduce direct soil contact with planter walls.
• Easy, mess-free installation: place inside the planter, press into corners, and trim to height as needed; add drainage holes if required.
• Outdoor-ready durability: UV-resistant and NZ-made for long outdoor life; recyclable and designed for seasonal changes.
• Planter-only design: ideal for square planter boxes and raised beds; not intended for ponds or water features.
• Enhance your setup: pair with OAKENZ Corner Feet to improve drainage, airflow, and surface protection.

Fit, care, and usage tips

• Fits square planter boxes up to 18 in x 18 in (500 mm) across a variety of materials; the flexible material adapts to corners for a clean finish.
• Height trimming is common to match your planter’s interior depth and drainage configuration.
• Quick installation requires no special tools—press into place, trim, and optionally create drainage holes at the base.
• Pairing with OAKENZ Corner Feet can help improve drainage and protect decks and patios.

Designed in New Zealand with durability in mind, this liner offers a low-maintenance way to prepare large square planter boxes for a range of plants. While it supports moisture retention and clean interior lines, results may vary with soil type, plant selection, and watering routines. Consider this liner as a versatile component of your container gardening setup rather than a guaranteed gardening solution.