When we first came here we had every pest on the Southern Tablelands. Now we don't have any major pest problems at all. We've still got a few pests - but they're kept in check by an enormous number of predators. As I write I can see a tiny warbler picking off mites from the kiwi fruit leaves and a blue wren gobbling aphids on the roses. Many garden predators are blossom feeders, and it's their larvae that like to eat pests.
Every garden needs blossom all year round.
After all, most predators are natives too. A word of warning about grevilleas - many people are allergic to them, especially the hybrids of G. banksii. Before buying a grevillea stroke a bit of it on the soft skin under your arm pit. If you come up in a rash avoid handling that particular grevillea. Confusing Pests with Companion Planting Pests recognise their food supply either by its shape or by its scent.