You probably won't see growth immediately, as your shedding hair and regrowth are busy tangling up around each other, and dreadlocking can come as a shock to your scalp.

Once your hair starts really dreading solid, visible growth should return. If you are regular with your palmrolling, the length is more noticeable - if your locks are all kinked up, you won't see it as fast. There's nothing you can do to make it grow faster, but a local stylist may be able to help with dread extensions.