How long will untreated wood last in raised beds? (2024)

How long will untreated wood last in raised beds? (1)

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How long will untreated wood last in raised beds?

It’s a question we get asked quite often, but it’s tricky to provide a quick answer because it depends on a number of factors, such as the type of wood, age and thickness, as well as the amount of rain and drainage.

For example, it’s certainly true that untreated hardwoods such as oak and red cedar will last for many years, performing better than untreated softwoods such as pine, however, in areas exposed to heavy rainfall, you may find even these types of woods start to deteriorate at a pace that’s not to your liking. One of the main considerations when investing in, or building your own, raised bed kits is maintenance.

We know that for most of our customers, they’re not too keen on fighting rot and fungal attacks on an ongoing basis, and that’s why our EasyFit Softwood Raised Beds are extremely popular. These treated softwood kits come with all the pieces pre-cut, completely ready to assemble, and they’re constructed from green Tanalith E pressure treated softwood sleepers, ensuring longer durability with little to no maintenance. These kits are designed to bridge the gap between durability and cost; ensuring customers can enjoy raised bed kits that last for many years, without the need for heaps of care and attention. We also supply moulded Loglap Planters, made from splinter-free pressure treated softwood sleepers, offering a crisp clean neat landscaping look that will serve you well moving forwards. That said if these softwood kits were not pressure treated, it’s highly unlikely they would satisfy our customers, and that’s why we recommend investing in pressure treated softwood.

Our Untreated English Oak Sleepers

For exceptional quality and durability, it’s well worth considering our Slot Together Heavyweight Oak Raised Bed Kits, created from chunky, new untreated English oak sleepers. They conveniently slot together without the need for screws or other fixings. Why are they untreated you ask?

It’s important to understand that these sleepers are cut straight from the tree and they’re machined to a very high standard, allowing for some knots and occasional small splits to the ends. Each sleeper therefore reflects the unique natural characteristics of oak, which is something that’s not worth compromising on – as we like to give you customers complete control of the treatment and finish . If you’re willing to invest in top quality oak, it’s highly likely you will want to ensure as much of the character comes to the fore, and that’s what these kits can deliver. That said, if you want to treat them, it’s very easy and we provide a huge range of exterior finishes to ensure your raised bed kits serve you well for many years to come.

Final thoughts

With untreated hardwoods, you can expect them to last for many years, if not decades, however, treated raised beds are always going to perform better, so we’d always advise you do so. We want our customers to ensure they create raised beds that perform well throughout the seasons, bringing quality and reliability to their landscaping projects.

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How long will untreated wood last in raised beds? (2024)

FAQs

How long will untreated wood last in raised beds? ›

Raised Garden Beds Can Last a Couple Years to a Lifetime

How do you stop wooden raised beds from rotting? ›

A good-quality, environmentally friendly wood sealant will improve the durability of your wooden raised bed by protecting it from the elements, particularly the moist soil on the inside. I use a mineral powder made by Eco Wood Treatment.

Will wooden raised beds rot? ›

The problem is, without being treated, wood can degrade quickly when it's next to wet soil and exposed to the elements. Rather than buying pre-treated boards, I prefer to add a wood preservative to untreated boards to increase their expected lifespan in the garden.

What is the longest lasting wood for raised garden beds? ›

Cedar is naturally resistant to rot and pests thanks to something called tannins. That makes cedar a timber that will last a long time. You can expect to garden in your cedar raised bed for at least 10 years before it starts to degrade.

Do you need treated wood for raised garden beds? ›

Pressure-treated wood is an economical option for improving the life of raised garden beds. However, some gardeners have concerns about the potential for the chemicals used to preserve the wood to contaminate the soil and plants....

What wood should not be used in a raised garden bed? ›

Avoid using older types of wood treatments such as CCA, creosote, and Penta-treated lumber. Research from Oregon State University showed that pressure-treated lumber does increase soil copper concentrations by a minor amount, but only within 1 inch of the raised-bed edge.

How long will untreated wood last in raised garden bed? ›

The Type of Wood Used

Pine is an inexpensive wood, but it can typically only be expected to last about 5 years, maybe 10 under the best conditions. Cedar, redwood, cypress, and hemlock are all types of wood that don't decay or rot quickly, and they can be expected to last anywhere from 10 to 20 years.

What raised garden beds don t rot? ›

Raised garden beds can be constructed from a variety of safe and sustainable materials. Cedar or redwood are two great options for wood as they are naturally rot-resistant and won't leach harmful chemicals into the soil.

How do you keep wood from rotting in a planter? ›

- Pond liner or geotextile fabric provides excellent durability and helps prevent wood rot. - Measure the interior dimensions of your wooden planter and cut the pond liner or geotextile fabric to fit. - Place the liner inside the planter, ensuring it covers the bottom and sides completely.

What is the best wood for raised beds on a budget? ›

Pressure-treated softwood sleepers are an attractive and economical alternative to hardwoods like oak, and will last for many years.

Is pine ok for raised beds? ›

Regular pine board can be used as well. Pine will last an average of 5 years as a raised garden bed, and redwood will last more like 10 years. Landscaping block and brick can make for a good raised bed as well.

How thick should wood be for raised beds? ›

Use lumber that's at least 2″ thick. Many beds are built of 2x6s, because a 6″ deep bed will grow nearly anything except carrots and parsnips. At Spotts, we use 2x8s because we like that extra depth. The easiest way to make a raised bed is just to screw some 2x6s together to make a square.

How long will untreated wood last outside? ›

Untreated wood doesn't share the durability as pressure-treated lumber, because it lacks the same protective chemical preservatives. When left unprotected against elements like rain or snow, this type of wood deteriorates quickly – often within just a few years.

Will pressure treated wood leach into the garden? ›

Studies have definitely shown some leaching of ingredients from this wood into garden soil and onto foliage (most likely from dust kicked up from the soil), relatively little in plants themselves (many of the most concerning elements aren't easily taken up by plants), and very low concentrations in any event.

How deep should a raised bed be? ›

A depth of 8 – 12 inches will suffice for most gardening situations. Because of the excellent drainage properties of raised beds, it is possible to grow an abundance of vegetables in a limited amount of space.

What's the best thing to put on wood to keep it from rotting? ›

If you are looking for an invisible protective treatment for exterior wood that won't change the appearance of the wood but will help protect it from rotting, a wood oil or wood waterproofer is your best option.

How do you preserve wooden raised beds? ›

If you want to protect your wooden raised beds from the weather, there are some simple and effective steps you can take. Once constructed, the best solution is to treat them with the right paint or oil finish. It will make sure your beds remain in tip top condition over time and don't warp or crack.

Should you line a wooden raised garden bed? ›

Raised garden bed lining isn't mandatory to have healthy growing plants. But adding raised garden bed lining does provide benefits. Many experienced gardeners recommend lining raised beds for these reasons: It provides insulation for the soil and helps control temperature fluctuations.

What is a non toxic wood preserver for raised beds? ›

There are wood preservatives on the market such as Croma Wood Treatment that are non-toxic, water-based preservatives, specifically formulated for use on compost bins, raised beds, grow tables and vegetable planters.

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