Those that grow their own vegetables might be interested in a recent study which has found that organic tomatoes contain more vitamin C. Although the fruits tend to be around 40% smaller than those grown by more conventional methods it seems the organic alternative is healthier. The reason could be down to the fact that the plants suffer more stress as they are grown, having to fend for themselves rather than being treated with pesticides and artificial fertilisers. I do try to grow most of my fruit and veg without resorting to any chemicals although sometimes have to resort to the odd slug pellet out of desperation.