General Plant Information (Edit)
Plant Habit: Cactus/Succulent
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Minimum cold hardiness: Zone 9b -3.9 °C (25 °F) to -1.1 °C (30 °F)
Fruit: Dehiscent
Flowers: Showy
Suitable Locations: Xeriscapic
Houseplant
Resistances: Drought tolerant
Containers: Needs excellent drainage in pots
Miscellaneous: With thorns/spines/prickles/teeth

Image
Common names
  • Moon Cactus
  • Ruby Ball
Botanical names
  • Accepted: Gymnocalycium stenopleurum
  • Synonym: Gymnocalycium friedrichii

Photo Gallery
Location: My garden in Tampa, Florida Date: 2023-07-09 Buds of my de-grafted gymnos.
Location: My garden in Tampa, Florida Date: 2023-07-16 Fully opened bloom of my degrafted gymno.
Location: My garden in Tampa, Florida Date: 2022-10-16 My moon cactus mini garden.
Location: My garden in Tampa, Florida Date: 2023-04-13 Separated from grafts to be grown on its own roots.
Location: My garden in Tampa, Florida Date: 2022-10-16 My moon cactus mini garden.
Location: My garden in Tampa, Florida Date: 2022-06-10 My grafted moon cacti!
Location: My garden in Tampa, Florida Date: 2022-08-19 My cactus bloomed again.
Location: My garden in Tampa, Florida Date: 2022-07-23 Gorgeous bloom of my grafted moon cactus.
Location: My garden in Tampa, Florida Date: 2022-10-15 My moon cacti collection… finally repotted.
Location: My garden in Tampa, Florida Date: 2023-04-15 Degrafted and repotted.
Location: Tampa, Florida Date: 2022-03-09 My moon cactus - purplish color and reddish purple.
Location: My garden in Tampa, Florida Date: 2022-08-18 My blooming moon cactus.
Location: My garden in Tampa, Florida Date: 2022-10-15 My moon cactus… finally repotted.
Location: Sandy, Utah, United States Date: 2018-07-17
Location: My garden in Tampa, Florida Date: 2023-08-31 All were purchased March 2022. The 4 to the right we’re degraft
Location: My garden in Tampa, Florid Date: 2023-08-31 My de grafted moon cacti.
Date: 2021-01-25 "Red" variety
Location: My garden in Tampa, Florida Date: 2022-06-10 My grafted moon cactus.
Location: My garden in Tampa, Florida Date: 2022-06-19 Happy Father’s Day blooms of my grafted purple moon cactus!
Photo by Hamwild
Location: My garden in Tampa, Florida Date: 2022-06-10 Offsets on my grafted cactus.
Location: My garden in Tampa, Florida Date: 2022-12-11 A moon cactus with dead graft.
Date: 2018-09-13
Date: 2021-01-25 "Pink " Variety
Location: My garden in Tampa, Florida Date: 2022-06-10 My grafted cacti!
Date: 2019-08-29 Partial albino
Location: My garden in Tampa, Florida Date: 2023-07-16 This is the third day this tried opening and finally the buds hav
Photo by keithp2012
Location: My garden in Tampa, Florida Date: 2022-06-17 My purple moon cactus’ buds.
Date: 2021-02-26
Location: My garden in Tampa, Florida Date: 2023-07-10 My de-grafted moon cactus bloom.
Location: My garden in Tampa, Florida Date: 2022-06-19 My grafted purple moon cactus blooms!
Date: 2021-09-12
Location: Sandy, Utah, United States Date: 2018-07-17
Location: My garden in Tampa, Florida Date: 2023-08-06 New gymnos, look at the size of the pups on the left side.
Location: Fairfax, Virginia (Outdoors)
Date: 2018-09-13
Date: 2014-02-22
Location: My garden in Tampa, Florida Date: 2023-07-11 My de-grafted cactus’ bloom.
Location: My garden in Tampa, Florida Date: 2024-03-21 Very tiny seeds.
Photo by Gypsi
Date: 2016-07-15 Orange and red
Date: 2014-02-22
Location: My garden in Tampa, Florida Date: 2023-07-23 Propagating pups of my Gymno.
Date: 2017-05-12 A perfect color split!
Date: 2014-01-28
Date: 2014-02-06
Date: 2014-01-20
Date: 2014-01-20
Date: 2017-02-17
Date: 2014-01-20
Location: Riverton, Utah, United States Date: 2019-08-30
Date: 2017-05-05 Strange colored offset
Plant Events from our members
UncleWill On November 17, 2018 Obtained plant
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