I'm playing in the direwolf20 1.12 pack and had to resort to getting damp soil using creative because no matter what biome I tried, jungle included, none were 'damp'. Then when I put the soil down, surrounded by water, in a few different biomes including river and ocean it turns to normal moisture within a minute or so.

Edited to add, I also can't find, create or keep dry soil, it's not just damp soil.