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8 messages
17/02/2013 at 21:45

Hi all,

I've just made 2 raised beds from larch that I got from a local saw mill. Its was treated though with dark creosote (smells like). I saw somewhere that I should line the inside of the beds before filling, with plastic bags (saved from compost). What's the general consensus?

I have 2 raised beds, one 2.5m x 1m for veg and the other 2m x 1m (split level) for herbs and maybe some strawberries.

Many thanks,


17/02/2013 at 21:55

It's up to you really.  Lining the insides will redcue the amount of moisture the wood can absorb from the soil so it will alst longer and will also prevent any chemiclas leaching into the soil.   Very easy to attach with a staple gun.

17/02/2013 at 22:11

Better safe than sorry.  The general advice seems to be to line the sides anyway to prolong the life of the wood.

18/02/2013 at 07:49

I've lined mine with heavy duty polythene sheeting - quite cheap from the ironmongers.  I also lined the base with permeable membrane to stop the compost washing out of the bottom - it was a tip from someone on here.

18/02/2013 at 09:29

My beds are only a decking board deep so lining the bottom would stop me from growing deep rooted crops in those beds.  An allotment member was plagued by mares tail on a new plot and completely lined his new beds after digging out what he could of the weed.  It was alright for a bit  but some of the mares tail eventually showed up but it was certainly better than it had been and manageable.

18/02/2013 at 10:39

I have 3 raised beds - about to have a fourth. I put down large pieces of thick cardboard n the base - apparently bike shops are a good source and just painted the sides. I have since found that they are best with heavy duty polythene lining the sides so will do that with the next one. I have a big heavy cardboard box ready and waiting for the base

18/02/2013 at 11:29

one is 30cm deep
the other is 45cm and 30 cm
I will line them both
The soil below is quite good, if a little clay and mostly had turf over it for long time.

18/02/2013 at 12:10

Mine is clayey and laid to turf and I just put the cardboard on the turf. I'm sure some on this forum will say NO, but it has worked for me.   My beds are 30cm high

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