Campanula lactiflora (Milky Bellflower)
I had this old-fashioned cottage garden favorite in my garden for many years, and now it's back. Milky Bellflower grows to four feet, which may require staking if you live in an area prone to high winds. The bellflowers are pale lavender, scented (unusual for a bellflower), grow in full sun to partial shade, and will reseed if you let it. Zones 4-9. Quarts.