torge conrad writes
I have a couple of Hibiscus in self watering pots that i keep behind the
patio window which is south facing. they had a lot of tiny white flies and
i was told to spray with a mixture of water and dish washing liquid, which i
did. but about three days later they are now back again with a vengence. i
dont know where they have all come from suddenly.

i would prefer not to use chemicals to stop the white fly since i keep the
plants inside. any other suggestions please?

They're probably the offspring of the generation you killed.
Spray again with slightly soapy water.

Other possibilities:

1) yellow sticky flypapers - the whiteflies are attracted to the colour.
Will reduce but not eliminate

2) Biological control - predators for whitefly are available on-line.
You wouldn't be able to continue to use the soapy water as it would kill
the predator too

3) Take the plants outside and give them a good shake each time the
population builds up

4) Vacuum clean using the upholstery brush


--
Kay