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NOTES: The
white flowers colouration (depigmentation)
is due the absence of the
betalain pigments. This
pigments
are always present in the normal M. theresae and tinge the flowers and
stems of bright magenta/pink.
Cultivation:
M. theresae - like the other
Mammillarias of the saboae group -
is not the easiest of Mammillarias to grow and
keep, this is though it is easier
than some of its
relatives such as M. goldii. But all this species
require similar
growing conditions, and a
mineral-based potting mix is preferred. They need to be kept
dry in
winter.
Pot plants are quite
wet-sensitively. Care must be taken with watering
and needs good
drainage. Water sparingly
during the
growing season, keep very dry in
winter. But plants grown outdoor seems to tolerate easily
the winter wetness. Usually it is recommended to
overwinter this plant in a bright and warm greenhouse with at
least 8-10° C , but it proved to be quite
frost resistant and demonstrated to
survive safely
outdoor under a cover of
snow at a temperatures of -15° C.
Sun Exposure: Full sun - Light shade
Propagation: Seeds (if available),
cuttings or
grafting.
Germination of the seed can still prove to be a challenge.
Photo of conspecific taxa, varieties, forms and cultivars of
Mammillaria theresae:
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Cultivation
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