I planted mine blade by blade after just leaving it all in a clump. The roots were not taking to the soil so well in a clump, but it was grown emersed and then I did not insert it into my own soil... Anyway, I'd advise planting it bit by bit. It wasn't nearly as hard as I thought it'd be. I used very fine/pointy tweasers and it went in right away and didn't come back out. Very nice.
It may work another way, this is just the way I did it.