When i did grow salvia, the deformation was a curling of the long side of the leaf so that the end product was a smaller ver narrow leaf. Also the veins were more visible and the green was sort of dirtier. It could be the humidity as that comes with cold weather, and because the grow slowed i put more fertiliser in, so i should have reduced the fertiliser and increased the humidity. Its all very confusing, salvia d was definately one of the hardest plants i ever tried to grow.