I've just concluded an extensive study on 'foliar feeding'. I resume the foliar feeding (in veg state only) immediately. Not a doubt in my noggin.
Three different sources say pretty much the same thing:
FOLIAR FEEDING
Plants can absorb both water and nutrients through their leaves, so the nutrient-water solution supplied to the roots can be misted on the foliage as well. Leaves have stomata that serve the same purpose as pores: They open and close as needed to regulate the absorption or CO2, water, and nutrients. Foliar-fed plants grow faster. It also saves fertilizer compared to soil; about 95% of the fertilizer is absorbed as compared with betyween 10 - 20% using conventional methods. Foliar feeding is especially helpful when plants are suffering from a deficiency, because the needed nutrients are delivered directly to the plant parts that need it, the leaves.
...just sayin...and NO, aint gots no shugah!