-forge 1.11.2-13.20.0.2279
-BiomesOPlenty-1.11.2-6.1.0.2222-universal.jar

using the give command
/give @p biomesoplenty:dirt 1 0 {coarse:true,variant:loamy}
gives loamy dirt
and...
/give @p biomesoplenty:dirt 1 0 {coarse:false,variant:loamy}
gives loamy dirt as well

Am I doing this wrong? Not I also took out the variant:loamy.

Yes, that is incorrect. You're giving yourself an item stack of size 1, with 0 as the metadata and nbt tags as you've specified. However the nbt tags do nothing because we don't use them.

I'd suggest reading the Minecraft wiki entry for the give command, it seems you're confusing states and nbt values.

What I'm saying is, you're currently setting the itemstack NBT. You want to change the metadata value, which at the moment you're setting to 0 always.

Read the wiki, spent days researching and trying to figure this out. Only mod i have ran into with this is yours so it was new to me. I did not ask first thing I asked as a last resort. I'll just leave the blocks out and use something else.

To be even more specific, the wiki states the following as the command usage:

give <player> <item> [amount] [data] [dataTag]

You have:

<player> = @p
<item> = biomesoplenty:dirt
[amount] = 1
[data] = 0
[dataTag] = {coarse:false,variant:loamy}

The biggest thing I wanted to know was how to give a "course loamy dirt".
Something like biomesoplenty:coure_loamy_dirt
I was using the give command to make sure I had the name right.
I know that biomesoplenty:dirt 1 0 gives loamy dirt
biomesoplenty:dirt 1 1 gives sandy dirt
etc. just could not figure out the next step.

They'd have a metadata value of 8. (/give biomesoplenty:dirt 1 8). States essentially cover-up raw metadata values in current versions of Minecraft, which is why these values are used as opposed to what you suggested earlier. If you press F3 + H I believe it should show you what the metadata values are for every block in the game. If not, something like JEI would probably have an option for it

If you're confused why, it's because we use the four bits of metadata like this:

xyyy

where x is normal/coarse, and y is the type. I guess for your purposes, you can just add 8 to all of the metadata values to get the coarse variant.

/give biomesoplenty:dirt 1 8
worked. I cannot believe the number of hours/days I have spent on overthinking this. I guess I could have asked right from the start but it annoys me when people do not try to figure out something themselves.
Also I knew about F3 + G but F3 + H is new to me. Thanks for the help, now I can use your dirt variants in ruins and mmd orespawn.