Are landscape timbers good for raised beds?

Landscape timbers can work for raised beds, but they're not the best long-term choice for New Brunswick's climate. While they're affordable and easy to work with, the freeze-thaw cycles and moisture in our Maritime climate will cause them to deteriorate within 3-5 years.

The main concerns with landscape timbers are durability and potential chemical treatment. Most pressure-treated landscape timbers contain chemicals that can leach into soil over time, which isn't ideal for vegetable gardens. The wood also tends to split and warp as it goes through New Brunswick's harsh winter freeze-thaw cycles, especially when exposed to our high humidity and significant snowfall.

For New Brunswick conditions, consider these better alternatives: Cedar boards are naturally rot-resistant and will last 8-12 years without chemical treatments. Composite lumber costs more upfront but handles our climate beautifully and lasts 15-20 years. For a permanent solution, concrete blocks or natural stone work well with our frost depth of 1.2-1.5 meters, though they require proper drainage underneath.

If you do choose landscape timbers, select untreated cedar or hemlock timbers rather than pressure-treated ones, especially for edible gardens. Build your beds in late spring after the ground has dried out from snowmelt, and ensure good drainage by adding a gravel base. Plan to replace the timbers every 4-5 years as they deteriorate.

The ideal raised bed height for New Brunswick is 8-12 inches for most vegetables, which allows good drainage while protecting roots during our cold winters. Make sure your beds are no wider than 4 feet so you can reach the center without stepping on the soil, which is especially important with our clay-heavy soils that compact easily.

Consider hiring a professional if you're planning multiple large beds or want a more permanent hardscaping solution with stone or concrete blocks. A landscaper can ensure proper drainage and frost protection, which is crucial for structures that need to survive our winters.

Need help finding a landscaper for a more permanent raised bed solution? New Brunswick Landscaping can match you with local professionals who understand our unique growing conditions.