White fly problem on waxy plants- need natural solution

I'm trying to read as much as I can online as I seek help dealing with my white fly problem - for now they're on my gardenias, but as they are planted next to my garden I'm forseeing major problems - maybe as soon as I go out there today. What are your best ideas? There seems to be a consistency in advising me against spraying waxy leaves with insecticidal soaps: ie. gardenias.

Thanks in advance!