The fire-cracker cactus - 10 seeds

The fire-cracker cactus - 10 seeds

3.99

he fire-cracker cactus, Cleistocactus smaragdiflorus, is a shrubby cactus species at first erect, then crawling on the ground with long basally branching stems, up to 1.5 metres tall and 6 metres in spread. It greatly resembles Cleistocactus baumannii in size and appearance except that the spines are usually shorter and darker and the scarlet flowers are tipped with emerald green. Distinguished by the brilliant emerald green tip to its red flower, this free-blooming species is slimmer than Cleistocactus strausii, but not nearly so well known. 

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Cleistocactus smaragdiflorus is a a much decorative hardy cactus.
Soil: Grow it in a rich and particularly draining substratum, as it is very sensitive to rottenness when in presence of humidity and low temperatures and let the soil dry out between waterings.
Water: In summer, during the vegetative period, it must be regularly watered, but allowing the substratum to completely dry up before irrigating again; in winter, it’s to be kept dry. Preferable not to water on overcast days, humid days or cold winter days.
Hardiness: This is one of hardiest of the woolly columnar cacti from Bolivia that grow at an altitude of up to 1000 meters. It is a frost resistant cactus, hardy to -7°(or even less if very dry). However in cultivation it is better not to expose it to temperatures lower than 0° C, even if in an aerated and protected location, in order to avoid the formation of anti-aesthetic spots on the epidermis. In presence of high atmospheric humidity avoid any frost as it is particularly sensitive to root rot. 
Exposure: It need full sun exposures with ample airflow to produce dense hairs, but, as a former mountain dweller, does not care for extremely high temperatures in summer. 
Maintenance: Repot in the spring, when their roots become cramped. Generally, they should be repotted every other year in order to provide fresh soil. After repotting, do not water for a week or more.