That rate would be for mature specimens shooting. You're talking inches a year for a year or two.

You can expect them to get to about 2ft in the 1st season, 4-8ft the 2nd season, and 15-20ft the 3rd season under ideal conditions, but that is not that easy to replicate. In most cases, you can get about half that growth rate.

Here's a blog that really shows how they grow with a moso seedling farmer.

Here is a link that might be useful: moso blog

I grew moso from seed about 12 years ago. I have a lot of experience growing bamboo. Mine is about 15 feet high now.

Plant the seeds in a germination tray like you would with any veggie seed; keep in a warm and sunny place,and keep the soil moist. You should see growth after several weeks if you bought fresh seeds. (I won't ask where you got them, as it's illegal to import them.)

If you expect anything spectacular in terms of size, you would do best growing them in Vietnam...