Last weekend I lifted my early potatoes that I had growing in raised beds in my poly tunnel. When eating the potatoes they appear to have a tainted taste but cant quite identify it. The raised beds were made from old (10 years +) pressure treated sleepers that I acquired. As the sleepers were not deep enough by themselves I raised the height by attaching two 4" fence posts again recycled from my garden. I did not treat the sleepers again but I did give the old fence posts a coat of Creocote the modern equivalent of the old fashioned creosote and I am beginning to wonder if has given the spuds the tainted taste. The raised beds were new and the soil was a mixture of old grow bags, my own compost, coarse sand and recently dug up soil.
Has anyone experienced anything similar. I am thinking that I may have to ditch them all (+/- 6kg) I have now also planted other veg in the space vacated by the spuds.
Any advice ??
Cheers, BBL