A pallet raised bed costs almost nothing and takes a weekend to build

A pallet raised bed is a wooden frame made from shipping pallets stacked and fastened together. You source free or cheap pallets, cut them to size if needed, nail or screw them into a rectangle, line the bottom, and fill with soil. The whole project takes four to six hours and costs between $20 and $60 for hardware and landscape fabric — the pallets themselves are often free from loading docks, warehouses, or online marketplaces.

The main advantage is cost and speed. A new cedar raised bed kit of the same size runs $150 to $300. The main drawback is durability: untreated pallets rot in three to five years depending on your climate and how wet the soil stays. Treated pallets last longer but may contain chemicals you do not want near food crops. If you are willing to replace the frame every few years or accept the shorter lifespan, this is the fastest way to start growing.

Key Takeaways

  • Free pallets are available from warehouses, loading docks, and Facebook Marketplace, but you must inspect them for chemical treatment before using them for food crops.
  • A basic 4-by-8-foot bed requires four pallets, a drill, screws, landscape fabric, and two to three hours of assembly time.
  • Untreated pallets last three to five years in wet soil; treated pallets last longer but may leach chemicals into vegetables.
  • The bed sits directly on the ground with no bottom, so you will need landscape fabric to block weeds and a soil depth of at least 10 to 12 inches for most vegetables.

Finding and inspecting pallets

Free pallets are easiest to find at warehouses, loading docks, and distribution centers. Walk in during business hours, ask the dock manager if they have pallets to give away, and load them yourself. Many places are happy to have them taken. Facebook Marketplace, Craigslist, and local Buy Nothing groups also list free pallets regularly — search "free pallets" in your area and message sellers who list them as available now.

Before you take a pallet, check the stamp on the bottom. Pallets marked HT (heat-treated) are safe for food crops. Pallets marked MB (methyl bromide) contain a pesticide and should not be used for vegetables or herbs. If there is no stamp, ask the source what the pallet carried. Pallets that held chemicals, pesticides, or unknown industrial goods are not worth the risk. Pallets from grocery stores, garden centers, and beverage distributors are usually safe.

Inspect the wood for rot, large splits, and mold. Press your thumbnail into the wood in a few spots — if it sinks easily, the pallet is rotting and will not hold together. Avoid pallets with heavy staining or chemical smell. You need four pallets for a standard 4-by-8-foot bed, or three for a 4-by-6-foot bed.

Tools and materials you will need

Gather these items before you start: a power drill with a screwdriver bit, a circular saw or hand saw (optional, only if you need to cut pallets to length), a level, a measuring tape, a pencil, and work gloves. You will also need 3-inch exterior wood screws (about 20 to 24 for a standard bed), landscape fabric, and a staple gun with staples.

Do not use nails — they loosen over time as the wood shifts and the bed settles. Screws hold much better. Buy screws rated for exterior use so they do not rust. Landscape fabric blocks weeds from growing up through the bottom while letting water drain. A 4-by-8-foot roll costs $10 to $20 at any garden center.

Assembling the frame

Lay out your four pallets on level ground in a rectangle. If the ground is uneven, use a level to check each corner and add soil underneath to shim it flat. Uneven beds drain poorly and settle unevenly.

Position the pallets so the stringers (the thick wooden beams running lengthwise) face inward. This gives you a stronger frame. At each corner, drill two pilot holes through the outer pallet into the end of the adjacent pallet, then drive a 3-inch screw through each hole. Drill slowly to avoid splitting the wood. You should have two screws per corner, eight total.

Check that the frame is square by measuring corner to corner — both diagonals should be the same length. If they are not, adjust the corners until they match. Once the frame is square and level, you are done with assembly.

Lining the bottom and filling with soil

Lay landscape fabric across the bottom of the frame, overlapping the edges by at least 6 inches. Staple the fabric to the inside of the pallets every 12 inches or so. The fabric should cover the entire bottom and extend a few inches up the sides. This blocks weeds and prevents soil from washing out while still allowing drainage.

Fill the bed with a mix of topsoil and compost. A 4-by-8-foot bed that is 12 inches deep holds about 32 cubic feet of soil, or roughly 1.2 cubic yards. You can buy bagged soil and compost from a garden center, or order a bulk delivery from a landscape supplier — bulk is cheaper if you are filling more than one bed. Mix about 60 percent topsoil and 40 percent compost for vegetables.

Water the soil as you fill to help it settle. Let the bed sit for a few days before planting so the soil compacts slightly.

Extending the life of your pallet bed

Untreated pallets rot from the bottom up because they sit in constant contact with wet soil. You can slow this by keeping the soil from touching the wood directly. Line the inside walls with landscape fabric or cardboard before filling, or place a plastic sheet under the entire frame. This adds a week or two of work but can extend the bed's life by a year or two.

In wet climates or if you water heavily, expect three to four years before the bottom pallets start to soften. In drier climates, untreated pallets can last five to seven years. Once the wood begins to rot, the frame loses strength and the bed becomes unsafe. At that point, you can either replace the pallets or disassemble the bed and start over.

If you want a longer-lasting bed, use pressure-treated pallets instead. These last 10 to 15 years. The tradeoff is that pressure-treated wood contains copper compounds that can leach into soil over time. For ornamental plants this is not a concern, but for vegetables and herbs many gardeners prefer to avoid it. Read the pallet stamp and ask the source if you are unsure.

Common mistakes to avoid

Do not skip the landscape fabric — without it, weeds will grow up through the bottom and you will spend the season pulling them. Do not use nails instead of screws; the frame will come apart as the wood shifts. Do not fill the bed with less than 10 inches of soil; most vegetables need at least that depth for roots to develop properly.

Do not assume all free pallets are safe. Always check the stamp and ask what the pallet carried. Do not build on uneven ground; spend 15 minutes leveling the site so the bed drains evenly and does not settle unevenly. Do not use pallets that smell like chemicals or show heavy staining — the cost savings are not worth the risk to your plants.

Frequently Asked Questions

Can I paint or stain the pallets to make them last longer?

Paint or stain will slow rot but not stop it, especially on the bottom where the wood touches wet soil. Use exterior-grade paint or stain rated for ground contact. Avoid sealers that trap moisture inside the wood — they can actually speed rot. The best approach is to accept that untreated pallets will need replacing in a few years, or use treated pallets from the start.

What if I cannot find free pallets in my area?

Check Facebook Marketplace, Craigslist, and Buy Nothing groups in neighboring towns — people often list them for free and will hold them for a day or two. If that does not work, buy new untreated wood from a lumber yard and build a frame the same way. A 4-by-8-foot bed made from 2-by-10 boards costs $40 to $60 and lasts longer than pallets.

Do I need to treat the wood with anything before planting?

No. Untreated wood is safe for food crops. Do not use wood preservatives or sealers unless they are specifically labeled for vegetable gardens. Let the wood weather naturally — it will turn gray but remain structurally sound for several years.

How deep should the soil be for different plants?

Leafy greens and herbs need 6 to 8 inches. Tomatoes, peppers, and beans need 10 to 12 inches. Root crops like carrots and beets need 12 inches or more. A 12-inch-deep bed works for almost everything, so that is a safe standard depth.

Can I use pallets that were treated with chemicals?

No. Pallets marked MB or that carried pesticides, solvents, or unknown chemicals should not be used for any plants you plan to eat. The chemicals can leach into soil and accumulate in vegetables over time. Use only pallets marked HT or those from known safe sources like grocery stores or beverage distributors.