Minecraft wiki entry for Snowlogging, associated text: Placing a plant in an existing snow layer (this removes the snow).[1] This is unlike waterlogging, where placing a block in water creates a waterlogged block.
Snow golems walking through plants (the plants do not become buried in the snow the golem leaves behind).[2]
Using commands, such as /setblock or /fill, to place plants where snow is, or vice versa (this eliminates the block that was previously there).