Cephalocereus senilis , normally know as Old Man Cactus , is one of the most democratic and identifiable member of the Cactus family . It is native to Mexico in area such as Guanajuato and Hidalgo , locate in the east . The fine white hairs treat the entire fleshy columnlike organic structure and hide the sharp spines . Aside from its magic spell , the hair serves an significant purpose . It protects against the harsh desert sun common to this plant life ’s native home .
Thiscactuscan go outside inUSDA Plant Hardiness Zones9 and 10 . Native toMexico , it needs live , dry climates and bright sunlight . The plant uses long hair to keep itself coolheaded in its raw habitat . As an out-of-door flora , it can get 45 feet ( 13.7 MB ) tall but is generally slow - growing as a potted plant .
Old Man Cactus is mainly grown as ahouseplant . It stay small and is well kept in a container for its entire life . Indoor cactus maturation requires a sunny window and temperature of at least 65 ˚F ( 18 ˚C ) . For honorable growth , give it a winter hibernation period below 65 ˚F ( 18 ˚C ) .

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For indoor cactus growing , utilize a cactus mix or blend of Amandine Aurore Lucie Dupin , perlite , and surface soil . Also , use an unglazed pot for Old Man Cactus . This will tolerate the sight to vaporize any excess moisture . Old Man Cactus likes its dirt on the teetotal side . Overwatering is a vulgar cause of rot and disease .
Allow the top few inches of thesoilto dry out completely between waterings . Then , in winter , reduce tearing to once or doubly during the season .
Fertilize with cactus food in early leaping , and you might be rewarded with thick pink peak . This cactus grows a pinkish - red fruit in its instinctive home ground , but this is rarefied in cultivation .
Old Man Cactus needs a gay , quick location but has few other needs . You should watch it carefully forpeststhat can hide in its hairsbreadth . These include mealybugs , scale leaf , and flying pestilence .
Old Man Cactus is wanton to diffuse from semen and cut .
source take a long time to grow into something recognizable as a cactus , but it is a cheap and fun project .
Cuttings need to consist on the counter in a dry placement for a couple of day to callus . Then , insert the cut final stage with the ironical , white callus into a soilless medium , such as sand or perlite . For good rooting , keep the press cutting in temperate but not scald twinkle where temperatures are at least 70 ˚F ( 21 ˚C ) . Do not water until the little film editing has been rooted . Then , cover your newfangled Old Man Cactus as you would a fledged specimen .
reference : gardeningknowhow.com
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