Oxypetalum coeruleum, Tweedia caerulea

USDA Plant Hardiness Zone Map

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True-blue flowers are rare and these aquamarine gems will sparkle in the garden. The cultivar 'Alba' has white flowers, while 'Rosea' has pink flowers.

Only reliably hardy in the mildest of gardens, so grow as an annual or a conservatory perennial. Evergreen when kept above 5°C.

Similar plants:

• Epiphyllum oxypetalum (Belle de Nuit, Lady of the Night, Queen of the Night, Night blooming Cereus, Dutchman's Pipe)
• Cissus tweediana (Cissus)
• Dolichandra unguis-cati, Macfadyena unguis-cati, Doxantha unguis-cati, Bignonia tweediana (Cat's Claw)