Copiapoa dealbata F.Ritter
Copiapoa carrizalensis, Copiapoa cinerea var. dealbata, Copiapoa cinerea subsp. dealbata, Copiapoa malletiana, Echinocactus malletianus
Copiapoa dealbata is a cespitose, grayish-white, globular cactus, forming with time imposing mounds up to 3.3 feet (1 m) tall and more than 6.6 feet (2 m) wide. The individual head is globose to short cylindrical, up to 6.4 inches (16 cm) in diameter and with apex wool-covered. It has only 1 single spine up to 2 inches (5 cm) long (sometimes 1 to 3 smaller) from the areoles. They are needle-like, black to light brown, becoming grayish-white with time. The flowers are pale yellow, up to 1.4 inches (3.5 cm) long and in diameter. They appear in summer. It is not unusual for Copiapoa to take 6 to 10 years before it starts blooming.
USDA hardiness zones 10b to 11b: from 35 °F (+1.7 °C) to 50 °F (+10 °C).
How to Grow and Care
Despite the extreme and specific conditions in habitat, Copiapoas as a whole are surprisingly easy in cultivation. From seed sewing to the care of mature plants, this genus is very forgiving. While staying manageable in size, Copiapoa in cultivation will flower from a young age and reliably so each following year.
These cacti want exposure to half or full sun. If they are in full sun, they must be in a position with good air circulation or they risk sunburn.
Watering should be extremely poor. The soil must dry out completely between waterings. They should, however, be suspended during mid-summer. In this period instead of watering it will be appropriate to spray the plant early in the morning, before the temperature warms up, thus simulating the conditions that they would have in their natural environment.
Copiapoa dealbata is native to Chile.
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