spraying the leaves

Im about to transplant 3 headband plants into 3 gallon buckets. I was wondering if it is safe to spray the foilage with the thrive alive B-1 Green after I transplant them? The plants are about 4-5 inches tall, do you think theyre ready to be transfered from the 1 gallon buckets to the 3 gallon buckets?

I'd wait... I go from solo plastic cups to 1 gal once they are about 4-5".. Then I go from 1gal -> 3gal once they are about a foot.. Never had one sign of transplant shock. I use pH'd RO water with a little of dutch master gold's penetrator once I transplant. When I transplant I also water the medium with straight pH'd RO water and a light feeding of cal-mag and 1 drop / gal of superthrive.