Calanthe Sieboldii is a winter-dormant hardy plant. During its blooming season, the shoots slowly unfurl to pleated green leaves around a cluster of tight buds that expand to a spike of good-sized, bright golden-yellow flowers which are varyingly infused with brown on the tepals. Height about 24 inches. Planting 1. Use of compost rich in humus and pine bark is recommended. 2. Suitable for growing in pots with well-drained substrate. Over retention of water could lead to rotting. 3. Calanthe are semi-rustic and can withstand a minimal temperature of -10Â°C, However, in regions with harsh winters, it is advised to shelter them from frosting. 4.Shades or wind sheltered site out of direct sunlight.