Scaling some trees/shrubs, but not all?

[Jasmer]

Hey guys, I'm trying to figure out how to scale certain shrubs and trees without scaling all of them like Enhanced Vegetation does. I only want to scale specific flora. I'm trying to replace some Oblivion trees with different spts but some of the modders resource trees are incredibly small, I need them specifically to be much larger. How do I go about doing this? I can't seem to find an option in the trees section to scale any or all of them in any way, shape, or form, only billboards.