Thanks Kudzu. I think it's my wishful thinking. I thought that perhaps it would be like my Himalayacalamus falconeri 'Damarapa'. Even though it is recommended for zone 9 but it's hardy to 20F and I have it in a pot for over 5 years now. However, its culms don't display colors.

After years of wishful thinking (zone denial), I've learned the hard way that, even if I succeed for a couple of years with a bamboo that is marginal for me, it just takes one cold snap to whack my plant. I didn't want you to be disappointed.

Understood and much appreciated.

When placing tropical bamboos in cooler climates, I find that the south facing wall "rule" has given me surprising success! I place the plant around 4 to 8 feet off the wall or fence and if possible I paint the wall black or dark brown to help absorb heat throughout the day. Even in my foggy climate it seems to make a huge difference. And if you also have prevailing wind from the north then this works to shelter the plant from the harsh wind as well. Using this technique, Ive found that some of the tropicals will handle an overnight freeze(mild coastal) without damage to the plant. Im in the Central Coast of California, which is about as far north as you can grow any tropical bamboos with success, although ive seen some D. asper as far north as San Francisco.

Im currently growing a wide range of tropicals using this technique.

Thanks for the info, littlepepperboy. Unfortunately, I don't have a wall next or fence close to where I want to plant tropical bamboos. Hope to hear more about your success, perhaps with pictures:-)