Summer (Jun-Aug)

Agastache, white and blue flowers (zones 4 and 7) to October

Anthemis, ‘Marguerite’, yellow flowers (zones 2 and 4) until October-ish

Astilbe, coral-pink plumes of flowers (zone 2)

Brachyscome, blue flowers (zone 3) to October… annual?

Brachyscome, pink flowers (zone 1) to September… annual?

Bronze fennel, bronze flowers (zone 6) … annual?

Buddleia, purple flowers (zone 6)

Calendula, yellow and orange flowers (zone 8)… annual?

California Poppy, orange flowers (zone 8)

Campanula Persicifolia, blue flowers (zone 3)

Campanula x symphandra hybrid, bluebell-like flowers (zone 2) to October

Chives, purple flowers (zone 1)… annual?

Coreopsis ‘Early Sunrise’, bright yellow flowers (zones 2, 4, 6, 9) to November

Cornus Kousa ‘China Girl’, dogwood tree, cream-green sepals, raspberry berries (zone 7)

Cotton Lavender, yellow flowers (zone 2)

Delphiniums, pink and blue flowers (zones 1 and 2) to August/September

Diascia ‘Denim Blue’, mauve flowers (zone 3) to October… annual?

Dill, yellow flowers (zone 2)… annual?

Echinacea purpurea, ‘White Swan’, green-white flowers (zone 4) to September

Foxgloves, various colours pink etc (zones 1 and 2)

Gazania, orange flowers (zone 8)… annual?

Hebe, white flowers (zone 2) August flowering

Helichrysum ‘Korma’, yellow flowers (zones 1 and 2)

Hosta, pink-purple flowers (zone 2)

Hyacinths, white, pink, blue flowers (zones 2 and 4) June flowering

Hydrangea anomala petilaris, climber, white flowers (next to house) until September

Hydrangea macrophylla ‘Teller White’, white flowers (zone 6) to August

Jasmine, white flowers (zone 6)… guessing flowering time

Knapweed, ‘Centaurea montana’, lavender blue flowers (zone 3)

Lavatera x Clementii ‘Rosea’, pink flowers (zone 1) to November

Lavender, pink flowers (zone 1)

Lavender, blue flowers (zones 2, 3, 6)

Lobelia, ‘Cambridge Blue’ (zone 4)… annual?

Lupins, various colours (zone 2)

Malva sylvestris ‘Primley Blue’, blue flowers (zone 2) to September

Nemesia, various colours purple, pink, white (zone 3)… annual?

Nicotiana, lime-green flowers (zone 4)

Oriental Poppy, ‘Royal Wedding’, white flowers with purple centre (zone 3)

Osteospermum, pink-purple flowers (zone 4)

Paeony poppies, various colours, red, pink, white (zones 3, 7, 8)

Penstemon, blue-purple flowers (zone 3) from July to October

Philadelphus ‘mock orange’, cream flowers (zone 5)

Phlox Subulata ‘Temiskaming’, pink flowers (zone 1) to September

Phormium Tenax ‘Purpureum’, dark green-red foliage (zone 6)

Phygelius, yellow flowers (zone 4)

Phygelius, red flowers (zone 5) to October

Platycoden ‘balloon flower’, blue, pink and white flowers (zone 3)

Polemonium Caeruleum, Jacob’s Ladder, blue flowers (zone 6)

Potentilla fruticosa ‘Hopley’s Orange’, orange-yellow flowers (zone 8) to September

Primula, pink flowers (zone 1)

Salvia Sylvestris ‘Blue Queen’, blue flowers (zone 3)

Salvia Nemerosa ‘Schneehugel’, white flowers (zone 3)

Thalictrum delavayi, ‘Hewitt’s Double’, purple flowers (zone 4) until September

Verbena Bonariensis ‘Buenos Aires’, purple flowers (zones 2 and 4) July to October

Verbena ‘Sissinghurst’, red, white, purple, pink varieties (zones 1, 2, 4, 6)