• 1980 - Royal Horticultural Society - Gold medal

  • 1983 - Royal Horticultural Society - Grenfell Silver Gilt Medal

  • 1985 - Royal Horticultural Society - Grenfell Silver Gilt Medal

  • 1988 - Royal Horticultural Society - Gold Medal

  • 1991 - Alpine Garden Society - Gold Award

  • 1993 - Alpine Garden Society - Gold Award

  • 1994 - Royal Horticultural Society - Gold Medal

  • 1996 - Royal Horticultural Society of Ireland - Medal of Honour

  • 1997 - Royal Horticultural Society - Grenfell Silver Gilt Medal

  • 1997 - University of Dublin - Doctor in Litteris

  • 1998 - Royal Dublin Society - Honorary Life Member

  • 2001 - Royal Horticultural Society - Grenfell Silver Gilt Medal

  • 2002 - Royal Horticultural Society - Grenfell Silver Gilt Medal

  • · Hon. Member of Irish Garden Plant Society

  • · Friends of the Library, Trinity College, University of Dublin