Astrantia is a cool climate plant and likes part sun and moist soils rich in organic matter.
 
Seeds can be planted in fall for a sowing emergence or cold stratified in your refrigerator for 6 weeks. These take some patience as they can take anywhere from 1-6 months to germinate. Don’t throw out the pot or give up, they will come up with time. Just make sure the soil stays moist.
 
Grows up to 3 feet tall and 18 inches wide
 
Perennial zones 4-7, some sources say up to 9. 
 
This is for 20 seeds