Yikes, get that Bt sooner rather than later. I agree with Elaine, don't mix with anything else. Bt comes in both liquid and dry forms, I might be inclined to try the dust in conjunction with a liquid spray. The liquid would rundown into the nooks and crannies and the dust would cover the broad leaves better. Here are a few names to look for at your neighborhood place.
https://www.amazon.com/s/ref=n...
