Cephalocereus senilis (Old Man Cactus, Bunny Cactus, Old Man of Mexico, White Persian Cat Cactus)

Botanical Information

FamilyCactaceae
GenusCephalocereus
Speciessenilis
SynonymsCactus bradypus, Cactus senilis, Cephalophorus senilis
CategoryPerennials, Tropicals
OriginGuanajuato and Hidalgo in Eastern Mexico.

Details

USDA Hardiness Zone8a - 11b
USDA Hardiness Ref.
Canadian Hardiness ZoneRequires cool season protection under glass.
Canada Hardiness Ref.
RHS Hardiness ZoneH4 - H1c
RHS Hardiness Ref.
Temperature (°C)0 - 5
Temperature (°F)10 - 20
Height30 cm
Spread10 - 15 cm
GrowthSlow
Flowering PeriodNovember

Description and Growing Information

ShapeUpright columnar.
LandscapeInformal rock gardens, potted patio or indoor plant or as a specimen.
PropagationDivision of small columns.
CultivationPlant in loose, well-draining, gravelly, sandy or loamy soils in full sun to partial shade. More sun exposure will induce more growth of the hair-like fibrous coating.
Notable SpecimensCentennial Conservatory, Thunder Bay, Ontario, Canada.
HabitatDry rocky plains.
Bark/Stem DescriptionSolitary columns divided into 20 - 30 shallow ribs, carrying a thin yet dense layer of hairlike fibres, with 2cm long spikes underneath.
Flower DescriptionSmall inconspicuous flowers borne at the apex of columns. Will only show if grown outdoors in its natural climate.
Colour DescriptionDeep green columns covered in whitish-grey hair-like fibres.
Texture DescriptionSmooth, fuzzy.

Photographs