Name: Sandy B. Ford River Twp, Michigan UP (Zone 4b) (Zone 4b-maybe 5a)
I know nothing about this plant whatsoever... but a google search of "home depot white bird plant" gave me this link http://www.homedepot.com/p/Del... which describes the mature height at 60". (The web page also stated returns within 90 days of purchase.)
“Think occasionally of the suffering of which you spare yourself the sight." ~ Albert Schweitzer C/F temp conversion
