Here in Z6 CT a screen of P.bissetti, P. decora , and P. aureosulcata
does well all winter. The leaves will winterburn if you have
prolonged dry cold winds.
Mixing a few species keeps you from losing the screen should one
flower.

How oftern they flower, every year, once in 2/3 years?
Where can I buy from in New England area?
Do I plant one rhyzome or a few?
Are they invasive type? Iam looking one with more stem/bamboo than
folliage for planting around my warer garden and not to invade other
area.

TIA

Sam