They need a moist, fertile, slightly acid soil but dislike clay. The plants grow better when given some shade. In sunnier locations they need more moisture.
Primroses benefit from a summer mulch.
The plants multiply rapidly and may need to be divided every other year. Division may be done after flowering. The seed germinates in 21 to 30 days. A strain that produces flowers in a wide range of bright colors. Wayside Gardens 1999.