Gee, I hate to disagree with Pam, who is incredibly knowledgeable, and it's
hard to imagine that anything would grow *faster*
here in PA then in the
Pacific Northwest, but my arborvitaes went from 3-4 feet to 8 ft. in more
like 4 or 5 years. Some varieties--I have several-- were faster than
others, but none of them took anything like10 years to reach an impressive
size. I now spend considerable time each spring pruning them back, so they
don't get gangly and suffer ice storm damage.
Your mileage may vary, of course, according to the quality of you soil and
Zone 6, South-central PA
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