Causing item to place a block on top of clicked block instead of replacing it

[Bright_Steel]

I'm trying to cause my item to place down my bush block on top of the block being clicked. Right now, it replaces the block being clicked with the bush, but I need it to place the block on top. How may I do this? My current code:

 

@Override
public EnumActionResult onItemUse(ItemStack stack, EntityPlayer player, World worldIn, BlockPos pos, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ){

	worldIn.setBlockState(pos, BerryBushRed.instance.getDefaultState(), 3);

	return EnumActionResult.SUCCESS;
}