If, like me, you've pondered that question as you confronted your first artichoke, dandelion green, nasturtium petal salad or violent yellow wild mushroom, then you have some idea of the thoughts running through my head as, together with about a dozen others, I listened to wild food expert Jacky Sutton-Adam describe the joys and perils of eating weeds.
Jacky was about to lead us all on a wild food forage, Wild Food in a Day, put together by foodie event and workshop organizer Food Safari. Together with Polly Robinson, Food Safari owner, she'd scouted out this patch of private Suffolk land (we had permission) for likely nibbles but, as wild food is seasonal and we'd had an unseasonably early warm patch, there was no telling what we would find.
In our country clothes and sturdy shoes, and fortified with coffee and Polly's home made flapjacks, we headed out to forage. (British flapjacks, by the way, are not pancakes but crunchy bars made of oats, golden syrup and other ingredients.