I suppose our back garden is moderately sheltered but we are situated at the edge of Daventry, itself a small town, only about 300 metres as the Crow, Corvus corone, flies. The warmth associated with large urban areas, especially London, is hardly a factor and Stefen Hill is not really considered balmy. Yet a remarkably large number of plants are still in flower.
The climber, Thunbergia alata, commonly known as Black-eyed Susan, is on a wall which offers some sort of protection, but it is a native of east Africa and really enjoys warm conditions. Yet it seems happy enough.
Thunbergia alata, aka Black-eyed Susan, remains in bloom on our
garage wall. Stefen Hill, Daventry. 15 November, 2017