Suze9
I would leave them and see if the culms re-leaf or branch once its gets consistently warmer, say May; unless of course you want to cut them back.

Mike near Brenham TX

Once Golden Goddess is established they are relatively cold hardy. I am in a colder winter zone than you and mine must be able to regularly endure temps down to 20F. in the winter, a few times down to 10F and very rarely down to 0F. Mine look fine despite temps down to about 10F. this year and a few very windy days. (Mine get a lot of rain or snow thoughout the seasons though--which bamboos love.) I would leave the bamboo alone and very shortly they will resprout new leaves (unless the culms died--which I doubt). Being that your bamboos where just planted, they are more sensitive to the environment. Regular watering will help them root in and endure dry periods. (Bamboos are relatively drought tolerant once ESTABLISHED.) Good luck!

Thanks for the advice. I will wait and see what it does.

I thought I would post a followup to this thread.

The plants are fine. The vast majority of the culms finally pushed out new growth after dropping the old leaves. Slow going, though -- this has been an unseasonably cold and cloudy spring, with a couple of late (near) frosts.

Thanks for the follow up! This post helped me!