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Sulcorebutia gerosenilis
(Field number KK
2005 near Zudañez, province Chuquisaca, Bolivia Altitude: 2750 m over
sea level)
Grafted on a short Opuntia stock
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Description: This is a very distinctive
plant even without flowers. Its senile appearance is reflected in the
name.
Stem: at first single, offsetting in age forming clusters or
cushions, each stem 25–40 mm long and 25–40 mm wide of a bright red.
Flowers are cherry-red with pale centre, and arrive in late spring.
Spines: Hair-like, white or yellowish, twisted.
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Cultivation:
These
mountainous plants have thick
taproots and are
susceptible to
overwatering.
They loves a very
permeable, coarse
mineral soil as well as to be strictly
kept dry throughout the
winter quiescent period since it is very
sensitive to any
moisture excesses, To prevent
rottenness it is also advisable to surround its
root neck by very rough
sand or
grit, this help a fast water
drainage. They requires also an appropriate
air circulation and are sometime
grafted to avoid root problems. They need to be
kept in a cool place during winter rest (at 0-10°C).
This is important for the flowers
,as well as for their health. Without
this cool winter period, they normally won't
get any buds.
Grafted plants are very easy to grow, and are
quite frost hardy (-5° C) if kept dry.
Needs a full sun exposure ( light shadow my be useful in the
hottest summer days)
Propagation: Seed,
cutting,
grafting.
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