OK this is what my book says on the most common Aussie terrestrials:
Diuris (Donkey orchids):
Generally rewarding and relatively easy to grow in a pot. A suitable potting mix must drain freely and can be based on commercial mixes fortified with leaf mould or eucalypt shavings and coarse sand or gravel. Either plastic or terracotta pots can be successful and some spp. need a relatively large container. When growing they should be watered to keep the soil moist but not excessively wet and allowed to dry out completely while dormant overt summer. Repotting is necessary every 2-3 years. The taller spp. may require staking.
Thelmytra (Sun orchids):
Some spp. are easy, others very difficult. Pot in terrestrial orchid mix. Water regularly when plants are above groundm keep completely dry when dormant.
Wasp Orchids - Chiloglottis (The cool ones on the Discoery Channel):
Most spp. readily adapt to pot culture, flowering freely and increasingly in number. They are best grown in plastic pots in a sheltered position outdoors or in a cool glasshouse or bushhouse. Growers have had success with commercial potting mixes fortified with gravel. When the plants are growing, water them regularly but keep them dry while they are dormant over summer. Some spp. have a short dormant period and the tubers can sprout in mid to late summer. Repotting is necessary every 1-2 years. Leaf rusts can be a problem with some spp.
Duck Orchids - Caleana:
Difficult to grow.
Hammer Orchids - Drakaea
As Duck Orchids, the labellum swings down on contact with an insect pollinator to plant the pollen on its back. Difficult to grow, some success with methods similar to Caladena.
Greenhoods - Diplodium, Pterostylis:
Grow easily as pot plants and generally flower well. They multiply freely and build up to a potful in a couple of seasons. Specialist growers make theor own mix by commercial orchid potting mixer fortified with gravel have proved successful with easier species such as curta and nutas. Suitable conditions are provided in a bushhouse or cool glasshouse, with the tropical sppp. requiring extra protection. Most growers use plastic pots as containers. Water growing plants regularly but keep dry when dormant over summerl resume watering in the autumn. Repot every 2-3 years.
Phaius (These would be better in your humid environment):
Generally easy, need shade, warmth, humidity and free air moevment. Pot in a humus-rich freely draining mix. Water regularly and feed with liquid fertiliser. Repot every 2-3 years. A greenhouse is recquired in colder areas.
Caladenia:
As for Donkey orchids, but slightly harder to grow, usually surviving for a few years and fading away. Best results achieved in drier climates with low humidity. Growing readily but shy to flower.
Petalochilus:
As for Caladenia, storing dormant tubers with a ripe banana promotes flowering.
Australian orchids...
) Does anyone here has experience growing "Diuris" and/or "Thelymitra"?
) I was just curious... they are really cool plants 
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