3 years of Sequoia sempervirens, the species.
Yep, this is aproximately how she looked in early spring 2010... (less than an inch tall :))
(image by Danny S. at wikimedia)
August 2011 (about 1,2 meters - 3,5 feet tall)
September 2012 (more than 2 meters - 6 feet tall)
and she will be going strong for one more month or so...
What a magnificent plant!