I wish to experiment with green roofs and I wish to know if you can
suggest me Victorian native plants like grasses, tussocks, prostrate,
groundcovers, alpines, succulents, small shrubs, etc. that would
easily grow in 5cm/10cm (max 15cm) of media and that could withstand
period of dryness.

Green roofs will maybe have a grey water irrigation system but my aim
is having self-sufficcient environments with minimum man intervention.
For this I thught to use a special soil media mixed with Biochar.

The uniqueness of a green roof is that plants will have to perform
under extreme temperature flactuations and be adapted to period of
intense heat and intense rain (like, I think, many alpines do). So
they need to be more resilient and have high regeneration
characteristics.