Evening Primrose (Oenothera speciosa) - Perennial that blooms pink flowers in the Spring. 
 
Growth: Can grow 10” to 24” tall.
Light: Full sun.
Soil: Needs well-drained, loamy or sandy soil.
Hardiness: Winter-hardy.
Maintenance: Spreads easily, so plant selectively. Water regularly but avoid overwatering. Keep an eye out for root rot.
Benefits: Attracts pollinators like bees & moths.