Mine here in SE Michigan broke through the solid almost 3 weeks ago. But since the last several days have be extra chilly, there has been little growth. With the weather warming up quite a bit over the next 10 days or so, I expect mine to really get going.
My Hostas poked through the earth at about the same time but they are up between 4-5" while the Astilbes are at around 2"! Aside from coneflowers, they are my favorite perennial! Good luck!