Pretty petals can brighten up your food, not just your garden.
Sounds a bit hippie, don't you think, flowers in your food?
In fact, flowers have featured in our dishes since Tudor days and probably prior to that. Salads of the times featured many edible flowers, some pickled, others candied, as well as fresh blooms strewn on tables as decoration. Recently I watched a television programme about Elizabethan food. Their salads were probably the only things we would have wanted to eat.
When you think about it, vegetables and herbs all grow flowers (and these are all edible) and many other plants in our garden produce leaves and flowers that can be eaten or used to brighten up a dish.
I have one rule about garnishing and decorating plates: whatever is on the plate should be edible. So if you are not sure about the food safety of something don't put it on the table. This especially goes for that shiny Angelica.The true Angelica has a dull leaf, the shiny one should not be eaten.