Slightly... (1) under watering, (2) over feeding, (3) needs more P!
1. When the root zone repeatedly receives less moisture than it needs, plants will build up "cuticle" to slow down their evaporation rate, to retain water longer in their leaves, because they are not getting enough from their roots!
2. burning, from the tips moving inward.
3. yellowing veins, random yellowing polka dots that turn orangish brown overtime forming in a leaf in-between each leaf vain area!