Don't. The risk isn't worth it. If you could see how chilli thrips have nearly destroyed rose-growing in Western Australia in the last four years, you would know that it's in all our interests to keep pests out of places they haven't reached yet.
Oh I know there are big reasons for the phyto certs I was joking. We are already dealing with lantern flies and a hoard of other invasive species. No flower is worth the jail and environmental issues.
Honestly, I am glad you did. :) There are plenty of people who may not know why we have import and export laws and regulations. Better a nice an informative comment than a bigger mess. This is why I LOVE this forum and recite so much. I also learned about the thrip situation in Australia from you.
Only Western Australia so far. We hope the mainly-desert along the southern part of the border will keep them from spreading, but presumably they could hitch a ride on vehicles.