Why are my terrain textures blurry?

I'm painting tileable textures onto my terrain and they come out a lot blurrier than I'd expect.

Is this just because unity is mapping one big texture to my terrain so the detail I get for each bit is lower? If so how do people work around this... making smaller areas of terrain and linking them together perhaps?

If this isn't the issue and unity is supposed to display it like a normal tiled texture how do I achieve this?

Thanks a lot.