We have imported wildlife too. Our native bees were bought and placed here to take advantage of the abundance of native blooms we have now. They like the exotic species blooms too. We have native fish in the ponds. Always be aware of that too while I'm on that subject.
The animals you bring in can and will move into the native environment. Cats are the equivalent of a natural disaster. You can prevent this by keeping them indoors or in those excellent enclosed runs (they can be huge!). Even the fattest and most lazy cat will be a deterrent to wildlife. Please be a responsible pet owner. If you are an irresponsible cat owner and I have been in the past. PUT A BELL ON IT. Give the native animals a chance at the very least.
Exotic plants can be just as nasty. Pond weed is a good example. People put these wonderful looking plants into their ponds, thinking it doesn't overflow into a natural waterway. There are other ways of escape. A bird takes a drink, flies off with seeds or some of the weed stuck to its leg. Bingo weed escapes into the native environment.
Ask where you get the plants;
Is it native and endemic to the area? if yes Woot! If not ask;
How does this plant propagate its self.
Are the seeds produced on the plant are viable? if they are remove spent flowers, if you must have that particular plant.
Does it have a running habit like some bamboos? etc etc
Does it have the potential to become weedy?
Is it poisonous to humans or animals? The Dutchman's pipe is a classic example of why this question is important. A lovely looking vine it looks so much like a native vine that we have the Richmond Bird-wing butterfly lays its eggs on the exotic vine and the caterpillars that hatch die from eating the Poison/wrong food source. This butterfly is now endangered.
I am not against exotic plants. I have many in my garden. I like to pepper them through the natives. I knew a girl (Lets pretend it wasn't me.), that once said; I dislike natives they are ugly plants. She was right, some of them are ugly, mostly she was wrong. Natives to look good, need tip pruning regularly. When I say tip pruning this is how I do it. I walk around the garden with a cup of tea and pinch out any new tips that are growing straggly from the rest of the plant. I do this about once every 6-8 weeks. In most natives this causes the plant to branch out at the closest node from the tip prune. You end up with more flowers and a dense growth habit. Most natives too are natures design to save water, we are a dry continent. Small and less leaves, pale subdued greens, more branches all help our native plants survive the dry times. These features can make that lush cool green haven you wanted a little difficult to achieve. Notice I didn't say impossible. There are natives that have this lush habit. Native Gardenia is a perfect example, taro, gingers palms. For large backyards (Well huge), figs are stunning. Like me you can pepper your natives with exotics. Talk to your local native nursery, they will certainly have more of an idea than me.
At the end of the day I'm very proud that I have wildlife in the garden, snakes and spiders included. I love showing off my garden to all my visitors human, feathered furred and scale alike. Lets make sure our kids don't need to put a bird in a cage just to have it hang around.





