Mammillaria compressa cristata type B (Stout bluish form)
compressa is a heavily clustering
plant that form up to 1 m large cushion. It
is among the most famous cacti for its easily clustering and easily
The beautiful crested form develops huge brain-shaped hemispherical
However there are several different crested clones, some of them very
Mammillaria compressa cv. YOKAN)
Older crested plant are very priced.
Stem: Green to
bluish grey-green, With latex.
Tubercle: Prominent, close set, firm, bluntly angled, keeled.
Axil: With white wool and bristles.
Central spine: Absent.
Radial spine: 4 - 6, unequal, chalky white with brownish tips, 20
- 70 mm long, some very short
Flowers: Bell shaped, purplish pink to deep red, 1-1,5 cm in
Blooming season (Europe): Winter, early spring.
Fruit: Club shaped, red.
Cultivation: It is a
rapid growing species
. Water regularly in summer, but do
not overwater (Rot prone)
Use pot with good drainage and a very porous potting media,
keep dry in winter.
Feed with a high potassium
fertilizer in summer.
It is quite frost resistant if kept dry, hardy as low as -5° C (some
reports give it hardy to -12°C) Outside full sun or
afternoon shade, inside needs bright light, and some direct sun.
By stem cuttings from adult plants
in spring or summer or by grafting.
Pieces of crest must be dried out for at least 3
weeks before planting in coarse river sand. This is quite an easy
alternative and success is almost always guaranteed.