I was planning on trying Serenade for Fire Blight this year. Have a bottle, and it lists fire blight as one of the diseases it is effective for, but does not give any info on timing for FB or which point in the dilution range to use.

I understand that Serenade works by growing and occupying the sites that FB or other diseases would grow on, so I assume it is advantageous to spray it well in advance of FB outbreaks. But when, I don't see any info on what temps/humidity the bacteria in Serenade do well in.

Anyone have any suggestions on how to use this.

TIA