Assorted young orchids rescued.

[TheDirties]

I bought this assortment of young orchids cheap. They were in poor shape when I got them as they were in sphag moss in a sealed container, some wet some dry.

I've repotted them all in a mix of sphag, orchid bark, charcoal, and perlite as I had all these media lying around and placed them in a small greenhouse where they get lots of light for the first half of the day. Semi shaded for the second half.

That was about a week ago, since then one has died from crown rot, even though the potting medium was just a little moist, not wet. And another is looking quite burnt. Ive moved them to a lower rung in the greenhouse to avoid direct light.

Can anyone suggest anything to increase their chances of survival? Im in Sydney, Australia, its about 10-20 degrees Celsius.

There is a dendrobium, vanda, cattleya, bulbophyllum and cymbidium.