Cyrtanthus or purple Amaryllis

 Cyrtanthus, formerly known as Purple Amaryllis, are tender bulbs with magnificent trumpet flowers reminiscent of those of Amaryllis, cultivated in flower beds in the south. These plants develop ribbon-like, arching, green leaves and flowering stems between 30 and 60 cm (12 and 24in) tall with large umbels of 6 to 8 flowers ranging in shades from red to pink. Easy to grow but Cyrtanthus are frost-sensitive. In spring,  plant them in a large pot, in a mixture of 1/3 turf, 1/3 garden soil, and 1/3 sand. Leave the bulb protruding 1 to 2 cm (0 to 1in) above the surface and water without excess. A monthly liquid fertilizer application is necessary. Place the pot in full sunlight. Stop watering as soon as the foliage wilts. Among the 50 species, the most well-known is the Vallota speciosa or Cyrtanthus elatus, with beautiful bright red star-shaped flowers measuring 10cm (4in) in diameter. Advice: During winter, place the potted bulbs in a shaded and cool location. Be careful, Cyrtanthus do not like to be disturbed, repot only every 5 years.