How timely - I was just thinking what I should plant next season in front of my Purple Dome asters to hide the lower ugliness, which I just assumed was its normal MO as it happens every year. First thought was to pop in some garden mums or pansies to hide the brown and offer some color contrast. The pansies will hang on for most of the winter, but the garden mums are a pretty short show for me - they tend to fade from the top down pretty quickly.