I just planted 9 of these along a fence last fall.

I'm curious on when I should expect them to shoot (if at all) this year?

I bought a mix of larger ones (with 1-2 15-20' 3/4" culms, and others 2-3 7-10' 1/4"-1/2" culms)

The only ones that I have seen any type of activity on are two of the smaller ones, where I see shoots breaking the surface. The other 7 show no signs, although the leaves are green and appear to have weathered the winter.