I love the pink and purple flowers of my pulmonarias, and the spotted leaves are a plus. However, I have found them to be extremely invasive, and when I decided to clear them from one area, I found that they had incredible, huge, woody root systems - just a warning...
Wow, I've never heard of pulmonaria being invasive. I've had two different kinds for years and they've hardly spread at all. Of course, mine are planted with a bunch of other shade plants and I'm always fighting the weeds in those areas, so maybe they have nowhere to go, lol.
Yes, mine self-seed very well but because there is a lot of plants in the area where I have them planted the seedlings have not gotten out of bounds. But since I like this plant I don't mind that it reseeds. I am interested in what the new plants' flowers will look like though.
Coneflowers, corydalis, hosta, brunnera, and pulmonaria seem to all like seeding in my yard. I've been able to share my plants with others who are just getting started and are on a budget.
I wish I had the time to sell some of my seedlings as I can't always find homes for them all.