Yes!
There is a new local ordinance that prohubits Nitrogen and Phospherous fertilizer applications from June through September. I have done some Micronutrient sprays in the past, but this year I plan on doing more especially sprays that are higher in copper, and no Nitrogen.
I also apply in the mornings but when the leaves are dry! Sometimes morning dew delays the application. djmb74 is correct, it is best if the stomas are open.
