I know this is pretentious nonsense but have just made a salad with chicory flowers (blue), pot marigold (orange) and nasturtium (yellow and red). I might use the marigold flowers to dye some cakes or even cheese straws later! The flowers are lovely so I will limit my consumption and leave most for the insects. I especially like the chicory flowers which have self seeded from one plant last year to 3 this year.