Plant in full sun or partial shade with regular water. It is hardy to about 25 degrees F.

Mandevilla sanderi is endemic to the State of Rio de Janeiro in Brazil. First described as Dipladenia sanderi it was moved into the genus Mandevilla in 1933 when Robert E. Woodson made significant changes within the Apocynaceae family. The name for the genus honors Henry John Mandeville (1773-1861), the British Minister in Buenos Aires, Argentina and the specific epithet honors Henry Frederick Conrad Sander (1847-1920), a horticulturist and collector from Hertfordshire, England who brought the plant back from Brazil. This cultivar was selected by Ole V Christensen in Aarslev, Denmark, from a number of naturally-occurring mutants of Mandevilla sanderi and under the name Dipladenia 'Helle' was issued a US Plant Patent PP9,117 in 1995 but this patent has since expired. We grew this plant form 1998 until 2004. 

The information about Mandevilla sanderi My Fair Lady ['Helle'] that is displayed on this web page is based on research conducted in our nursery's horticultural library and from reliable online resources. We will also include observations made about this plant as it grows in our nursery gardens and other gardens that we have visited, as well how the crops have performed in containers in our nursery field. We also incorporate comments that we receive from others and welcome hearing from anyone with additional information, particularly if they share cultural information that aids others growing this plant.