"Doug Kanter" wrote in
:

Annual in African countries, annual or biennial in Latin & South
America. Middle East: Unknown thus far, but probably annual. He
Perennial (so far).

....but requires constant attention. Very susceptible to various
infestations. However, the results are worth the effort.

I assume by "here" you mean temperate North America. I understand it is
fairly hardy in Australia and much of Western Europe and isolated
places elsewhere.

Jim
Zone 6, Niagara