Discocactus

Family: – Cactaceae
Habitat: – Southern Brazil, eastern Bolivia, northern Paraguay
Cultivation: – Cactus are usually hardy plants, but Discocactus need some special attention: they need protection from cold and rot. Water only when the soil is completely dry and avoid temperatures below 10 degrees.
Curiosity: – Its name comes from the Greek “diskos”, it refers to these plants’ shape. Discocactus is an endangered genus.

– KEY FEATURES

Discocactus are plants characterized by their flattened shape, similar to a disc. These plants are small, with their stem segmented by vertical ribs. The spines are robust, long and light colored. From the generally flat surface appears, in 10-years-old plants, a white cephalium: out of which the flowers will rise in summer. Some species develope the cephalium after only 3-4 years. Their white flowers will only last for a few hours, but every plant will produce so many flowers that the blooming is still enjoyable!

– VARIETY AND TYPES

-Here are some of the most important species of Discocactus:

  • Discocactus albispinus
  • D. araneispinus
  • D. bahiensis v. gracilis
  • D. buenekeri
  • D. cangaensis
  • D. catingicola
  • D. cephaliaciculosus ssp. nudicephalus
  • D. crassispinus
  • D. crystallophilus
  • D. estevesii
  • D. ferricola
  • D. hartmannii
  • D. heptacanthus v. semicampaniflorus
  • D. horstii
  • D. insignis
  • D. magnimammus
  • D. pachythele
  • D. petr-halfari
  • D. placentiformis
  • D. placentiformis ssp. multicolorispinus
  • D. prominentigibbus
  • D. pugionacanthus
  • D. pulvinicapitatus
  • D. rapirhizus
  • D. silicicola
  • D. subviridigriseus
  • D. zehntneri
  • D. zehntneri v. araneispinus

 

– TIPS FOR GROWING

SUN EXPOSURE:
Discocactus prefers full sun exposure, especially during winter. It’s important to repair these plants from the summer sun (during the hottest hours of the day).
TEMPERATURE:
Maintain the temperature above 10-15ºC: Discocactus are very cold-sensitive!
WATERING:
Water only every 3-4 days but make sure the soil dries up before each watering, these plants are subject to root rot!
SUBSTRATE:
Use a substrate that allows a good draining, with perlite or pomice.
REPOTTING:
Choose not so large and medium deep pots: repotting is necessary during the first years, when the plant is growing.
PROPAGATION:
They can be propagated only by seeds. Seeds have to be planted in sandy, humid soil, protect against direct light. Mantain the temperature between 21-25 degrees.

Official Web Site:
www.giromagi.com

Italian Blog:
www.giromagicactus.com

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