Apologies @dafman for hijacking your post
I am about to put in the soil for my raised bed and notice that there is a 4 mm gap on all sides where the
top and bottom planks meet . The wood was left to dry for about 4 weeks and has caused this shrinkage.
Should I bother with sealing the gap with a jute rope or caulking agent so that water and soil will not ooze out from the side.
I am mindful of not using any sealer as this is a vege bed and dont want other chemicals to leech.
OR do nothing, assuming that the moisture from the soil and watering will cause the wood to swell closing the gap?