Cereus genus (Apple cactus). This is a columnar, perennial cacti with spiny stems; there are about 40 species. The flowers are cup-shaped and usually open at night.
Grown for the cup-shaped flowers usually open at night.
They are frost tender, min 7C and will need full sun and very well drained soil.
You can propagate in the spring by seeds or branching species by stem cuttings.
Scale insects may be a problem.
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