Here is another plant that will be showy in your yard until way into the fall. It can take -10C and come out smiling as soon as it warms up. In fact it seems to intensify the colour. It is of the cabbage family and is actually extremely good for you to eat. I always grow a couple to put out when everything else has died off. Pretty easy to start from seed.
A lovely purple Kale plant
Permanent link to this article: https://horseflyrealty.ca/2012/horsefly-news/a-lovely-purple-kale-plant/