Neem Oil was only registered for Leaf Shine, yet Ed Lawrence Head Gardener at Rideau Hall , Governor General of Canada recommends and uses Neem Oil as a Pesticide.
Master Gardeners all over Ontario are flocking to Ed Lawrence for more advice on how to deal with the Ontario Pesticide Ban.
I'm sure Ed will come up with more illegal options or he will tell you to open up your wallet and pay thru the teeth to rotate and replace your flower garden every year.
Rideau Hall is a money pit for grounds maintenance now that the pesticide ban is in place. $1 Million dollars in costs over 3 years.