These plants grow best in cool-summer areas, such as mountainous or coastal regions.
| Common Name | Botanical Name |
| Beardtongue | Penstemon |
| Bleeding heart | Dicentra |
| Christmas rose | Helleborus |
| Columbine | Aquilegia |
| Groundsel | Ligularia |
| Lupine | Lupinus |
| Meadowrue | Thalictrum |
| Meadowsweet | Astilbe |
| Primrose | Primula |