Hi Robert,
I checked my records. The seed was acually sown in Jan 2003, so it has only been 4 years since sowing (or 3 years since germination). All 4 of my plants produced their first flower(s) this year, though one had a misshapen bud which I cut off. If your seed came from the same source (Chiltern Seeds?) I expect you'll get flowers in 2011.
An