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Astrophytum caput-medusae

Medusa's Head Cactus

TRY 3,999
In Stock

Astrophytum caput-medusae is poised to be one of the rarest gems in your cactus collection. Native to the Coahuila state of Mexico, this fascinating species is known as the "Medusa's Head Cactus" and derives its name from its unique, octopus-arm-like branching stems. Unlike typical cacti, this species develops succulent leaf-like branches adorned with small areoles bearing tiny spines, offering an exotic appearance. Each Astrophytum caput-medusae is like a natural work of art, mesmerizing with its surreal form that becomes more pronounced over time. Its rarity and unusual structure make it an attractive option for both beginners and experienced collectors. It's ideal for those looking to add an exotic touch to their home or office environment. With proper care, this awe-inspiring plant will bring joy for many years.

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Temperature
5-40 °C

Optimal: 24 °C

Light
Bright Indirect Light

Bright indirect light or filtered sunlight is best to prevent sunburn on the delicate tubercles.

Soil
Completely inorganic, porous, pumice and lava rock based cactus mix

Requires an almost fully mineral mix consisting of pumice, lava rock, and coarse sand.

Water
12-30 Days

Allow soil to dry out completely between waterings; dry winter rest is mandatory.

Difficulty
Expert

Highly prone to rot on its own roots; suited for expert growers or as a grafted plant.

Frequently Asked Questions

Can Astrophytum caput-medusae be grown indoors?
Yes, but it is an expert-level plant requiring extremely gritty soil and careful moisture control. Grafted specimens are easier to keep indoors.
Is it better to grow it on its own roots or grafted?
Plants on their own roots are highly prone to rot. Grafted specimens are much hardier, faster-growing, and highly recommended for most collectors.
How often should it be watered?
Water only when the substrate is completely dry during summer (about every 10-14 days). Keep entirely dry throughout the winter.
What soil mix should I use?
Use an almost entirely mineral mix consisting of pumice, lava grit, and coarse sand, with very little to no organic peat (maximum 10-20%).
Does it like direct sunlight?
It prefers filtered bright light or partial shade. Harsh, direct midday sun can easily scorch its thin tubercles.
What color are the flowers and when do they bloom?
It produces large, showy yellow flowers with bright red-orange centers from the tips of its tubercles during late spring and summer.
How fast does it grow?
It is extremely slow-growing on its own roots. However, when grafted onto Trichocereus or Myrtillocactus, its growth rate increases dramatically.
Is it toxic to pets?
Astrophytum caput-medusae is non-toxic and safe for homes with cats and dogs.
What temperature does it need in winter?
During winter dormancy, it can tolerate temperatures down to 5°C, provided the soil is kept completely dry. Protect it from frost.
What should I do if a tubercle breaks off?
Tubercles are difficult to root directly, but they can be used for micro-grafting. The main plant will eventually push out new tubercles from the break site.

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