Foliar feeding, in fact, is a technique in which a liquid fertilizer is sprayed directly onto the leaves and absorbed through the stomata and epidermis.
Plants can take nutrients more quickly through their leaves than through their roots.
The stomata of the leaves allow nutrients to pass through.
Plants "breathe" through stomata, which are pores on their leaves.
Water can enter through the stomata while they are open. And nutrients that have been dissolved will also enter with the water.