•  Mammillaria Polythele (Martius) Cactus is a tall (or sprawling) cylindrical cactus with prominent bumps or "tubercles". This rare plant has a dark green stem and the tubercles are surrounded by woolly white hair. It is native to Mexico where it can reach 24.0" tall and 6.0" in diameter.
  Flowers are pink to purple and bloom from between the tubercles in a ring atop the stem.
  
  All of the plants may be shipped bare root.
• Bright light, full sun to partial shade.
  
  Water thoroughly when soil is dry to the touch, then let drain completely. Reduce watering in the winter.
  
  Porous and well-drained cactus mix.
  
  Feed with a cacti fertilizer mix during the growing season.
  
• USDA Hardiness Zones 9a to 11b: from 20 °F (-6.7 °C) to 50 °F ( 10 °C).