A good time for ornamental grass
And the further west you go, the better and more distinctly beautiful this light becomes. So, as the days shorten and the sun sinks lower in the sky, it emphasises colour as it backlights the intricate tracery of many autumnal flowers.
This effect can be seen to best effect in September and October when the low light coincides with the peak of their flowering, but I feel they need something bold and arching to set them off.