Remove old flower heads to promote fresh buds, flowers until late summer.
divide established clumps in autumn or early spring
Gems can easily be grown from seed and flower the same season, but they may not always come true to the parent plant
For optimal germination, soil temperature should be a minimum of 10°C / 50°F.Cooky prefers a sunny spot but can manage partial shade, its prefers rich soil that is moist but well drained although it can flurish in pond side areas.
Sunny conditions produce more flowers