What villan is chewing my passionfruit plant's leaves - no sign of a creature just heaps of holes. If you do know -do you know how to best deal to them??

Passionvine hopper? But they usually suck . Could it be snails climbing up at night? I would try snail bait at the base first. Next I would look for nasty little caterpillars. If all else fails a spray may be the only thing you can do to kill the nasty little jaws.

Try the spray I've just posted on the post about Garden Recipes.