I'd like to have a region in my world be a predominately hilly, karst style (so lots of limestone) area that has a predominance of thick, dense thickets, brambles and shrubs.
So my question is, what soils/climates/biomes/etc... do thickets and briar style growth grow best in (in order to achieve a dense landscape of such) and can this match up with a hilly, karst landscape?
Can thickets of briar and brambles feasibly grow in a karst style limestone landscape?