"Margaret Paige" schreef:

Hallo again,

I posted this question in a Dutch newsgroup too and there someone
suggested
it had to do with fertiliser I'd used, though I can't remmeber using
any
fertiliser on my hibiscus bush.
Any have any comments/

Hi Margaret,
my guess, too, is the weather: unusually hot + dry + much sunlight.
I noticed a change in colour on a perfectly dull lila-flowering
Buddleia, showing whitish-lila flowers all of a sudden.
My guess is that this is the same syndrome.

(I tagged that branch, to propagate and see what comes)

Dag, Annet