Traveling to Canada...need some quick help!

I am going to be rolling up there real soon, like a day or so...any advice on border crossing in a car? Only carrying about a gram.
Also...what are the laws like? Can you buy seeds up there, do they have dispenseries?

Any help would be greatly appreciated.

depends on where you are going
most large cities have dispensaries

Thanks...I was in a very rural area, so it became a moot point.