Australian Proteas Comment The Protea flower is South Africa's national flower, but many people don't know that most plants in the Protea family are actually Australian Natives. Banksias are from the Protea family and many of them flower is summer and autumn.I am very excited that some of the first banksia flowers from our new batch of plants are coming into flower for the first time. These plants were put in the ground 2 years ago, and were so tiny when they went in, I couldn't imagine they'd even survive, let alone flower. But many of them are now coming into bud. And they are beautiful buds, too! A promise of a beautiful flower.