There are several reasons why using new, untreated wood from sustainable sources is preferable to pallets or reclaimed timber for planter boxes:

  1. Chemical Contamination
  • Pallets: Pallets are often treated with chemicals like methyl bromide (a fumigant) or CCA (Chromated Copper Arsenate) to prevent the spread of pests and diseases. These chemicals can leach into your soil and potentially be absorbed by your vegetables, posing a health risk.
  • Reclaimed Timber: The origin and prior use of reclaimed timber are often unknown. It could have been treated with paints, stains, preservatives, or other harmful chemicals to your health and the environment. That “bargain” planter box might be hiding a toxic secret!
  1. Structural Integrity and Longevity
  • Pallets: Pallets are designed for heavy-duty transport, not for holding soil and plants. They may not be structurally sound for long-term use as planter boxes, especially when exposed to moisture and the elements.
  • Reclaimed Timber: Depending on its source, reclaimed timber may be weakened or damaged, making it less suitable for constructing planter boxes.
  1. Pests and Diseases
  • Pallets and Reclaimed Timber: Both can harbour pests like termites or fungal diseases that can infest your garden.
  1. Environmental Impact
  • Sustainable Forestry: Wood sourced from sustainably managed forests ensures responsible logging practices and the long-term health of our forests.
  • Unknown Origins: With pallets and reclaimed timber, you often can’t be sure of the wood’s origin, which might not come from sustainable sources.
  1. Aesthetics
  • New Wood: New wood offers a clean and uniform look for your planter boxes, which one can easily customise with paint or stain to match your garden’s aesthetic.
  • Reclaimed Timber: While it can have a rustic charm, reclaimed timber may require more work to achieve the desired look.

In Conclusion

While using pallets or reclaimed timber might seem cost-effective and environmentally friendly, it is essential to weigh the potential risks. Using new, untreated wood from sustainable sources provides peace of mind regarding safety, durability, and environmental responsibility.

Additional Tips:

  • If you use pallets or reclaimed timber, ensure they are heat-treated (HT) rather than chemically treated (MB or CCA).
  • Thoroughly clean and sand the wood to remove any potential contaminants.
  • Consider lining the planter box with a barrier, such as heavy-duty plastic, to minimise contact between the soil and the wood.

Remember, the health of your garden and your family is paramount. Choose your planter box materials wisely!