Giant Bird of Paradise (Strelitzia nicolai) This offer is for a packet of 6 seeds Plant type: Tropical Perennial/Houseplant Hardiness: Zones 10-11 or Indoors Size: Up to 20 feet plus in the landscape. Remains much smaller in a pot, to around 6 feet. Culture: Full sun to shade. Rich, organic soil that is well draining. Regular water and fertilizer.