SpeedTree dynamic seasons

I know SpeedTree trees come with seasonal variants, but before I invest, I want to know if there is a way to change them dynamically? So for example, it starts snowing and the trees gradually get covered in snow.

I'm using Lux shaders for this very purpose on most objects to accumulate snow, however I don't believe there is an appropriate one in that collection for trees. Using the standard lux shader on trees doesn't tend to look that great and you lose the wind feature.

Any ideas?