Cactus e Dintorni

Habitat: Arizona, southwestern California, State of Sonora (Mexico).
Description: a genus of gigantic columnar cacti that may reach 15 metres (50 ft) in height. Very long-lived, they’re commonly named "saguaro"; the nocturnal flowers appear on 40 to 50 year-old plants and are pollinated by bats.
Soil: basic mix.
Location: grow in full sun.
Temperature: a minimum of 5°C (41°F) is recommended.
Water: they need to be watered mainly during the spring, sparingly in the summer and again more in the autumn; always let the soil dry out before watering.
Cultivation tips: easy but slow-growing; it can be propagated by seed or cutting. Apply fertilizer once every two months. As the plant grows older its appearance changes dramatically.
Main species of Carnegiea: Carnegiea gigantea is the only species.