Japanese Anemone root cuttings

I took root cuttings from a Japanese Anemone about three weeks ago and placed them about 1cm beneath the surface of a mix or perlite and compost.  Since then they have been kept moist and placed on a bright window sill.  Nothing has emerged yet but am I being too impatient?

Usually they start developing roots after 3 - 4 weeks, and then new shoots should follow pretty quickly. So you are a tad early in your expectations.