I love the coloration of the new shoots of Old Hamii. . You're right on the brink of it's hardiness at
15-18F .. In Austin your zone 8b I reckon? Have you tried mulching it heavy in the fall? It might give ya a shot.. I personally don't mulch the bamboo as it promotes shallow rooting - in an already shallow rooted grass; but if it's what it takes to get it through the winter than it's worth it. I'd rather lose a culm or two if it keeps it from dying to the ground..
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