How to Line a Raised Garden Bed: Best Materials & Step-by-Step Guide

Lining a raised garden bed is a simple step that can extend the life of your bed, improve soil health, and prevent weeds. But with so many options—landscape fabric, plastic, hardware cloth—it’s easy to get confused. In this guide, we’ll walk you through the best materials, step-by-step installation, and common pitfalls to avoid. Whether you’re a beginner or a seasoned gardener, these tips will help you make the right choice for your garden.

Why Line a Raised Garden Bed?

A liner acts as a barrier between your soil and the bed structure. For wood beds, it prevents rot by keeping moisture away from the lumber. For metal or plastic beds, it stops soil from leaching out through gaps. A good liner also blocks weeds from growing up from the ground and keeps burrowing pests like gophers and voles out. However, not all liners are created equal—the wrong material can trap too much water or degrade quickly.

Best Materials for Lining a Raised Garden Bed

Here are the most common materials, ranked by durability and cost:

• Landscape Fabric (Woven) – Best for drainage and weed prevention. Look for heavy-duty, UV-stabilized fabric (at least 3 oz). Avoid cheap non-woven fabric that tears easily. Cost: $0.20–$0.50 per sq ft.
• Hardware Cloth (Galvanized) – Ideal for gopher control. Use 1/4-inch or 1/2-inch mesh. It won’t rot but can rust over time. Cost: $0.50–$1 per sq ft.
• Plastic Sheeting (Thick) – Only use if you want to retain moisture (e.g., for bog plants). Must punch drainage holes. Avoid thin plastic that cracks in sun. Cost: $0.10–$0.30 per sq ft.
• Cardboard (Temporary) – Good for smothering grass but decomposes in 6–12 months. Use only as a bottom layer, not a permanent liner.

Our recommendation: For most gardeners, a combination works best: hardware cloth on the bottom (to block gophers), then landscape fabric on top (for drainage and weed control).

Step-by-Step Guide: How to Line a Raised Garden Bed

1. Prepare the site – Level the ground and remove any sharp rocks or roots.
2. Cut the liner – Measure the inside of your bed (bottom and sides). For landscape fabric, add 6 inches extra on each side to overlap.
3. Install the bottom layer – If using hardware cloth, cut it to size and lay it flat on the bottom. Staple or nail it to the bed frame if needed.
4. Add landscape fabric – Drape the fabric over the bottom and up the sides. Secure the top edge with staples or a staple gun (every 6–8 inches).
5. Overlap seams – If using multiple pieces, overlap by at least 6 inches to prevent weeds from sneaking through.
6. Add soil – Fill the bed with your preferred soil mix. The liner will settle against the ground.

Pro tip: If you’re using plastic, punch holes every 6 inches with a screwdriver for drainage.

Common Mistakes to Avoid When Lining a Raised Bed

• Using black plastic without holes – This creates a swamp, drowning plant roots. Always perforate plastic.
• Choosing thin landscape fabric – Cheap fabric tears within a season. Spend a bit more for heavy-duty.
• Forgetting to secure the liner – Wind can blow fabric out before you add soil. Staple it down.
• Using pressure-treated wood without a liner – Chemicals from the wood can leach into soil. Always line if using treated lumber.
• Not overlapping seams – Weeds will find any gap. Overlap generously.

FAQ: Lining Raised Garden Beds

Do I need to line the sides of my raised bed?
Only if the bed has gaps or you want extra protection from rot. Most people line the bottom only.

Can I use old pool liner or pond liner?
Yes, if it’s food-grade and free of chemicals. Cut drainage holes if it’s non-porous.

How often should I replace the liner?
Landscape fabric lasts 3–5 years. Hardware cloth can last 10+ years. Check annually for tears.

Is it okay to use cardboard as a liner?
For short-term (one season), yes. It will decompose and need replacement.

Final Thoughts

Lining your raised garden bed is a small effort that pays off for years. Choose materials based on your needs—drainage, pest control, or longevity—and install them correctly. Avoid cheap materials and shortcuts, and your garden will thrive. Happy planting!