Stratification: cold stratify for 90 days.

Germination: sow seed 1/8" deep , tamp the soil, keep moist, mulch the seed bed, , can be sown outdoors in the fall for spring germination.

 A deciduous Shrub growing to 2 m (6ft) by 1.5 m (5ft). It is hardy to zone 3 and is not frost tender. It is in leaf 11-Apr It is in flower from Jun to August, and the seeds ripen from Jul to September. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Apomictic. .The plant is self-fertile. The plant prefers light (sandy), medium (loamy) and heavy (clay) soils and requires well-drained soil. The plant prefers acid, neutral and basic (alkaline) soils..It can grow in semi-shade (light woodland) or no shade. It requires moist soil