It is the winner of multiple rose awards, including the Geneva Gold Medal and Rome Gold Medal and the Hague and Auckland Fragrance awards.

The flowers are light pink in cool weather and white in hot climates.

[1] 'Margaret Merril' was used to hybridize six child plants: 'Princess Alexandra' (1988), 'Carpet White' (1991), 'Victorian Spice' (1994) 'Mon Jardin et Ma Maison' (1998), 'Petticoat' (2004), and 'Rayon de Soleil' (2014).

[5] Harkness developed the rose cultivar by crossing ('Rudolph Timm' x 'Dedication') x 'Pascali' in 1972.

'Margaret Merril' has won multiple rose awards, including the Geneva Gold Medal and Rome Gold Medal in 1978, The Hague Fragrance Award in 1987, the James Mason Gold Medal in 1990, and the Auckland Fragrance Award in 1992.