The good people of Vegesafe have recently released a report on their findings re regards to heavy metals in Sydney soils and how that may affect veg growing. They will also be at the Australian Garden Show in Centennial Park so if you’re planning to go, you can bring in a sample of your soil for free testing.
We had Mark Taylor from Vegesafe come to Stanmore Public School to conduct tests on the soil in a number of different parts of the garden. Our soil in this garden was all pretty good (still elevated but not dangerously so). It was a really interesting process and Mark and his colleagues were full of helpful information. Here’s what I learnt:
- Lead in soil will usually be the result of a building having been there and old lead paint flaking off and getting into the soil; or
- Left over from the days of leaded petrol if you’re on a busy street;
- Plants don’t tend to take up lead from the soil so eating plants grown in lead contaminated soil isn’t the problem (though probably still not recommended);
- The problem comes if you don’t wash your veg properly or if you are playing in the dirt or tracking it through the house or in some other way coming into contact with it and possibly ingesting it. This, particularly for young children, is the problem.
- Mulching and generally making sure there are high levels of organic matter in the soil reduces the levels of lead contamination in your soil.
Mulching! Is there nothing it can’t do?! But seriously I think this illustrates again the importance of good soil. Vital to our health, our food’s health and our children’s health, it’s worth the time to get it right.