How do I get the most benefit using foliar sprays?

When foliar feeding, always adjust your pH before spraying. Using a wetting agent also makes a big difference. Wetting agents reduce surface tension allowing the foliar spray saturate the leaves & be absorbed into the plant tissue instead of running right back off of the plant. Spraying a plant without a wetting agent is like spraying a waxed car with water, it just rolls right off.