In article , Nick Maclaren
wrote:

Basil (Ocimum basilicum) originated in tropical Asia, perhaps India,
and has been cultivated for a VERY long time. The prevalence of
parasites is strong evidence of an origin in a similar ecology.
Also, it is a perennial in its natural habitat but, like many tropical
perennials, will grow as an annual in colder climates.

Thanks for this. I think it may have been you, nick who pointed out the
tropical origins?

But (blushes), I didn't quite get the full gist of your point about the
parasites? Could you expand? ( I *think* I understand, but might be
wrong, ok?)

Lazarus

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