Seeds Plectranthus ecklonii Groot spoorsalie. This is a soft, erect, fast growing shrub to 8 to 10 feet tall. Mass planting of the blue, white and pink cultivars are very striking. This plant is best grown in partial shade. It is recommended for gardens where frost is not too severe. In colder climates it can be grown as a container house plant indoors. Hardy in zones 9 to 11.