Pittosporum Tom Thumb A popular evergreen shrub. For most of the year it has dark purple leaves, contrasted beautifully by bright-green fresh growth. Growing as a short rounded bush, Pittosporum tenuifolium Tom Thumb is a must for any low maintenance garden, it tolerates dry summers and damp winters, and never really needs much care. Site: ?Tolerates coastal winds Soil: Prefers well drainedPosition: Full sun, semi shadeSeason of Interest: Evergreen, Summer flowersHardiness: Hardy to -10°CHeight: 3ft (1m) Spread: 3ft (1m), sometimes larger