The Washington Post, November 29th, 2007
QI grew marigolds this year from some old seed. The pot is filled with plants but no flowers. Why? AMarigolds are generally easy to bring into bloom. You may be growing the species Tagetes lucida, which does not bloom until late autumn. It is often known as Mexican mint marigold and is used in recipes in much the same way tarragon is used. You might also be growing Tagetes erecta, the tall African marigold (which is not native to Africa, by the way). It is taller and blooms much later than the more common French marigolds, Tagetes patula (which are not native to France). Sunlight might also be...
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