  Let $X$ be a CAT(0) cubical complex. The growth series of $X$ at $x$ is
$G_{x}(t)=\sum_{y \in Vert(X)} t^{d(x,y)}$, where $d(x,y)$ denotes
$\ell_{1}$-distance between $x$ and $y$. If $X$ is cocompact, then $G_{x}$ is a
rational function of $t$. In the case when $X$ is the Davis complex of a
right-angled Coxeter group it is a well-known that
$G_{x}(t)=1/f_{L}(-t/(1+t))$, where $f_{L}$ denotes the $f$-polynomial of the
link $L$ of a vertex of $X$. We obtain a similar formula for general cocompact
$X$. We also obtain a simple relation between the growth series of individual
orbits and the $f$-polynomials of various links. In particular, we get a simple
proof of reciprocity of these series ($G_{x}(t)=\pm G_{x}(t^{-1})$) for an
Eulerian manifold $X$.
