Habitat: Guatemala, Mexico.
Description: cacti with slender, branched, sometimes dentate stems, that may produce flexuous runners. They flower reliably once reached maturity. The funnel-shaped, large, fragrant flowers open during the day in the summer and are long-lasting.
Soil: fertile mix.
Location: grow in partial shade.
Temperature: the minimum temperature should stay above 8-10°C (46-50°F). They enjoy warm conditions.
Water: let the soil dry for a week from March to September; water once a month the rest of the year.
Cultivation tips: if temperatures are kept above 20°C (68°F) the plants have no rest period, they may show an epiphytic habit. Spraying some water is beneficial also when plants are resting. Propagate from stem cuttings.
Main species of Heliocereus: Heliocereus speciosus; Heliocereus cinnabarinus.