Podzol gradient

So I made a stoney gradient with Andesite/gravel/mossy and stone. however, I didn't think about the transition to podzol. Its on modded minecraft, but I want to forgo modded blocks with gradients. What would be a good gradient?

Currently: Mycelium/lightgray terracotta and coarse dirt is the transition.

Thoughts?

On the right are some blocks I thought about using, but they do not really match imo. The dead brain coral and tube coral are nice, but are gray as well. Which I do not need more of.