Tibouchina : Greenhouse Plants
W – warm, minimum of 13°C (55°F)
Tibouchina semidecandra has the curious name of Brazilian Spider Flower. The flowers, rich purple and at least 8 cm (3 in) across, are produced virtually all year round while there is sufficient light and warmth. It is the stamens in the centre of the flower which look uncannily like a spider lying on its back with its legs in the air. Although plants will grow easily to 3 m (10 ft) in height they are also obliging enough to make good small flowering pot plants, sometimes flowering as soon as they have rooted from. It is easy to control ultimate size by annual pruning in the spring. Tall plants will need some support. Cuttings 8-10 cm (3-4 in) long are extremely easy to root in spring and summer. Seed which is freely produced by home-grown plants as well as being easily bought should be surface sown on to moist peaty and given a light position at 15-21°C (60-70°F).