Beware Cadmium Poisoning
Just a caution about growing food in tyres. Tyres contain cadmium which fixes the colour in rubber. Cadmium, though little talked about, is one of the more poisonous of the metals in our environment. Potatoes are known to accumulate cadmium, as do cabbages, carrots, radishes, lettuce, turnips, tobacco, cocoa and peanuts. Obviously potatoes are a concern because they form a large part of most people's diet. As is the case with all heavy metal poisoning, the early symptoms are not noticed until it is too late.
So now I'm worried... would paint stop it leaching or would using something like Pond liner with some holes in the bottom be better? Would a black bin liner suffice?
I did read the bit about old tyres being oxidized but better safe than sorry is my motto...
Has anyone else made these type of planters?
Info came from: http://www.thriftyfun.com/tf284146.tip.html
Tutorial is: http://www.wuvie.net/tireplanter.htm
*worried*
