0.5g (approx. 20 seeds). Annual climbing flowering plant grows 150-200cm (60-80in.) tall. Funnel-shaped, yellow, orange, white flowers, with a dark purple core, diameter 4-5cm (1.5in.). Blooms from July until frost. The winding stalks need support but can also be grown in hanging pots, allowing stems to hang down freely. Use for vertical gardening, balconies, arbors and fences. (Thunbergia alata).