Are you familiar with bamboo at all? Most species of bamboo flower and set seeds very rarely.........it may be 20, 30, even 100 years before a particular species of bamboo flowers and sets seeds. Therefore, seeds are rare to come by, typically rather expensive and often do not remain viable for very long. It is far easier to obtain started plants or culm divisions from established clumps.

Do you know what kind of bamboo you want? A clumping form or a running form? If a running type, are you willing to devote the effort into a containment system and the ongoing maintenance that requires?

Bamboo is not a plant selection that should be undertaken without a good understanding of what's involved in its care and siting. Many (most) types are extremely aggressive growers, spread rampantly and are over the top difficult to remove if they grow where not wanted or intended. I'd suggest you take this request - with a lot more details on exactly what you are looking for and for what particular situation - to the Bamboo forum for some very specialized input.