Ok so I do have experience in making housemods for oblivion and well today thought I'd create my first home mod in skyrim and I edited the ground ( which had grass btw ) to flatten it so the house would sit right and then I had the floating grass and rock problem so I F key the rocks and shrubs down. However, big BIG problem with the grass....

It doesn't select with my mouse and well I tried using a non grass texture to rid it, and yes saved and reloaded the CK but it's still there, and floating.

How does one rid the floating grass?

Thanks for any help.