Both Love-in-a-Mist (Nigella damascena) and Dame's Rocket (Hesperis matronalis) are flowers I tried after reading that they are usually left alone by slugs. Into my second summer with them I can confirm that this is true.
These flowers are touted as cottage garden favorites, and have been grown in European gardens for hundreds of years. That and the fact that they are native to Europe appealed to me. Love-in-a-Mist (in German: Jungfer im Grünen) is an annual, and Dame's Rocket (in German: Nachtviole) is usually called a biennial or short-lived perennial. In my garden, Dame's Rocket only survived one of our mild winters, but both plants have self-seeded very generously.
In fact, in the meantime I've learned that Dame's Rocket is regarded in some U.S. states as an invasive species, although in my experience, Love-in-a-Mist deserves this honor much more! I've been battling Love-in-a-Mist all spring, literally ripping out hundreds of offspring from the original 10 or so I planted from seed last year. Here it is crowding out some of my herbs. One place it didn't invade were the rows of winter onions you can see in these photos, so it must not like their company.
The photos above were taken at the end of May, but you can already see the myriads of seed pods being formed.
|Love-in-a-Mist seed pod|
|Dame's Rocket last year from nursery plant|
|Self-seeded Dame's Rocket this year|
|Transplanted, self-seeded Dame's Rocket|
Another observation: bees and butterflies just love the Love-in-a-Mist.