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Raised Garden Beds

Q.Lining For Wooden Veg Planters

Zone Cv4 8gz | Daljit added on June 5, 2020 | Answered

I have purchased some pressure treated timber to make outdoor vegetable planters. I am concerned after reading several articles on the internet that chemicals in the wood may ‘leach’ into the soil and ultimately into vegetables being grown. What can I line the planters with to avoid this? Some people say line with polythene, others say not, I am confused, please help! Thank you Daljit

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Certified GKH Gardening Expert
Answered on June 9, 2020

Lining will not stop the chemicals from leeching into the ground around your yard, and since you will not want the roots to remain wet and soggy the lining will need to be perforated. This means that the roots will still have access to the treated wood and the copper based sealants used. These sealants leech from wood very quickly, and with ease, so I do not recommend using them at all, even with lining.


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