Raised bed Timber

Do you use pressure treated or not hmmm
Kris

Not sure about the UK, but Canada has changed the chemical formulations in pressure treated lumber so that it's a little bit safer for handling. Old formulas were notorious for leaching out into the raised bed soil.
But in practicality, while non treated lumber is safer, its a real pain to replace regularly especially with prices raising steadily. I have to build several raised beds this year and the bottom frame will be treated, the uppers not treated but lined with heavy duty poly to lengthen their life. Some folk use free skid wood but that has short life.
Mostly it's personal choice.

Not sure about the UK, but Canada has changed the chemical formulations in pressure treated lumber so that it's a little bit safer for handling. Old formulas were notorious for leaching out into the raised bed soil.
But in practicality, while non treated lumber is safer, its a real pain to replace regularly especially with prices raising steadily. I have to build several raised beds this year and the bottom frame will be treated, the uppers not treated but lined with heavy duty poly to lengthen their life. Some folk use free skid wood but that has short life.
Mostly it's personal choice.

Same here. It doesn't have arsenic in it any more, still got the copper though. I don't use wood to raise the beds personally, they stay up just fine without any.