Purple Knight - Alternanthera Dentata

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Native to Central and South America. This frost sensitive plant is grown for its striking dark purple foliage. The rich colour is darkest in full sun, and makes a dramatic accent in sunny gardens.

They also make an excellent hedge and can be used as a beautiful foliage contrast against other plants and flower borders.

Common Name: Purple Knight Botanical Name: Alternanthera Dentata Plant size: Approx 12 - 15 cm Pot size: 50mm pot. Max growth: Approx high and 40 - 50cm wide. Maintenance: To maintain a compact habit or to keep a formal appearance, regularly pinch out the growing tips, trim the plants throughout the growing season in summer. They should be planted in well-drained soil, watering regularly during summer. They are very heat to Planting: Place one handful of the feed or a small handful of slow release fertilizer around the new plant once planted, fertilize every six months for best results
They prefer well drained soil.

Climate Zone

  • Arid
  • Subtropical
  • Temperate
  • Tropical


  • Non Flowering

Garden Style

  • Cottage Garden
  • Tropical Garden

Growth Rate

  • Fast


  • Border Hedge
  • Low Hedge

Plant Spacing

  • 20 - 30cm

Plant Type

  • Evergreen
  • Foliage Plants
  • Small Shrubs


  • Full Sun
  • Semi Shade


  • Container Plants
  • Edge planting
  • Feature planting
  • Mass planting
  • Retaining walls

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