Taken from The Edible Flower Garden by Kathy Brown . The following is a list of edible flowers which might be useful in the 6. soil surface layer of a forest garden (Hart 1996).
Nasturtiums: self seeder. Grow in partial shade. Peppery taste which is excellent in salads.
Hollyhocks: Self seeder. Grow in a sunny sheltered spot. Good in fruit salad.
Evening Primrose: Self seeder. Sunny spot. 2 years to flower. Roots can be eaten, tastes like parsnip. Flowers can be eaten bud and mature flower. Fresh taste.
Sweet Rocket: Self seeder. Sun or partial shade. Mild lettuce flavour.
The following may be useful in the 4. Herbaceacous layer.
Borage: Partial shade or full sun. Used in savory jellies, decoration .
Pot Marigolds: (maybe even used in the 3. shrub layer). Sun. Slight peppery tasting petals. Can be dried in large quantiies to flavour soups.
Chamomile: Mat forming perennial. Sun. Tea.
Fennel: Sun. Root, leaves, seeds and flowers are edible.
Bergamot: Sun or light shade. leaves can be used for stuffing or tea. Petals have a strong spicy flavour so must be used sparingly.