Fertilizing orchids, when, what and how much?

[Rosiefuture]

Although I have had orchids for a few years I wouldn't truly say that I've been growing them. They basically have survived despite me! LOL

I was very bad and have killed quite a few by not fertilizing, over watering, under watering and basically ignoring them.

Due to a MAJOR life change I am now a different person and I want to concentrate on looking after my orchids but there is so much I don't know.

When should I fertilize them? What should I fertilize them with? What strength? Do different orchids like different fertilizers?

I'm in Western Australia just south of Perth and we are just into our autumn here. Thanks Marion