Only Water Foliar Feeding

I have two spray bottles I use for foliar feeding during veg. I use a cal-mag foliar spray since I'm using LED and I use URB microbes as a foliar spray. I usually spray every other day and swap the bottle I use. This way, they get an even mix of foliar feeding. I've read that it is best to foliar feed right after lights come on and make sure you spray the under sides of the leaves, as the stomata will be open and available to uptake the foliar feeding. I hope this helps!