[1] After the war, Weisz returned to school and began to study horticulture during an internship at Het Loo Palace.

[2] He has created works for the Dutch royal family, including arrangements for the inauguration of Queen Beatrix and the wedding of Prince Willem-Alexander.

He was the keynote speaker at a 2007 United Nations exhibition, "The Holocaust Against the Roma and Sinti and present-day racism in Europe".

[3] On 27 January 2011, he was the first Roma or Sinti to address the German Bundestag at the official Holocaust Remembrance Day ceremony, speaking about the liberation of Auschwitz.

Queen Beatrix appointed Weisz to Officer of the Order of Orange-Nassau for his commitment to the Sinti and Roma communities, and for his work in the Dutch floral industry.