Hello Janice!

They need warmth, so nights not below 20º C, and days above 25º. In containers, you want the top cm of soil to dry between soakings, but don't let it wilt. Plant food should be high nitrogen, low phosphate, and moderate potash. Ideally, give it at least 6 hours of direct sun a day.

Too cold, allowing it to wilt between watering, too much plant food, and lack of light can all cause the flowers and young fruit to drop prematurely.

Tug has pretty much covered it - unless you have a conservatory or greenhouse these are not good croppers over here.
On the subject of wilting, it can be employed in general (cayenne for example) chilli cultivation. If I'm unhappy with the number of flowers I'll allow mine to wilt between watering - it's a subjective thing, but I find that it alters the plants "philosophy". Instead of going for growth it "panics" the plant into flower (and thus fruit) production.

A sudden reduction of resources causes early maturity, but note that those buds form after the wilting! Any buds, flowers, or young fruit present during the wilting stand a good chance of dropping.

Agreed - as I say it's subjective, you have to get a feel for what is possible.
I've stopped growing chillies since moving next door to an Indian caterer, as I now get my chillies as trade price.
One other point to add - keep the pots on the smaller side.

Thanks for all the help, much appreciated. Jan