My favorite plant of the week is Blue Mist Flower, formerly Eupatorium coelestinum. I ordered a plant in February along with some other plants and the others grew but the Eupatorium remained a black stump. However, up around it grew 5 micro seedlings. They continued to grow and were transplanted into individual pots, then in August when 6" tall, I set them out in the garden. I was very surprised a week ago to find one had developed flowers already. This is a great native flower that attracts pollinators and multiplies by rhizomes, so I'm hoping it will occupy some ground and therefore shut out some weeds. It likes water so I can plant it in the very soggy ground near my leaky hose bib and hope it will flourish there.
The flowers are not what I would call blue, typical nursery plant hype, but magenta. They open to make fuzzy flowers, mist-like, here not quite open.
I'm enthusiastic about a plant that can perform that fast, so many perennials take 2 years or more to bloom, so it is my favorite plant this week.
To see other bloggers' favorite plant of the week, click on Loree of Danger Garden's link, and look for more links in the comments section.