That's right. Though once established, it can really increase in size
(by putting up new shoots) each May. Once it gets going, you can feel
free to get agressive about pruning out the smaller culms or culms that
are too close together, and trimming off lower branches to show off the
culms that they might be obscuring.

If you want to give it as much energy as possible for growth, do this
in late fall / early winter. If it is growing too quickly and you want
to slow it down, do this right after the shooting season finishes.

FYI, you probably have Phyllostachys aureosulcata 'Aureocaulis', which
is a little different (golden vs. dark green) than regular
Phyllostachys aureosulcata. More info on this bamboo (both types) can
be found at these links. I have no affiliation with the site, but find
it has good info.

http://bamboogarden.com/Phyllostachys%20aureosulcata%20'Aureocaulis'.htm
http://bamboogarden.com/Phyllostachy...eosulcata.html

Cheers!