Web Master:
Hey Bosco, given that your garden is native the bigger problem here may be water.
Most ferns need to planted in an area which is well draining but moist, rainforest like.
Is the area you wish to plant near a pathway?
If not maybe you could consider something a little different like a saw tooth palm (Serenoa repens) which will put up with less water and tolerates salt, it is not a native but then neither is your Photinia so it shouldn't look out of place.