That depends on 2 factors, the light you have them exposed too, and cuttings dont always take to soil, aerocloners are the way to go.
Note on the light: Most people have better luck cloning under flourescent lights. I remember seing a post years back about a guy using indirect sunlight with wonderful results. And try as I did, I could never get anything to root under HID lighting, sombody else may have figtured out how, but I had terrible luck in my efforts.