I would say it is, I mean here in Canada all they do to check whats on you is walk through a metal detector but you put carry ons through an x ray which they check with computer. I think if you had them in your pocket even the wouldn't even notice since they are really looking for weapons (mostly metal).
The point I'm trying to make here is if you do hide seeds in your bag they may suspect they're somethng dangerous, which they are not.
I think I have the best idea though. It may work to go out and buy like 5 packs of LEGAL seeds, like whatever vegetables or something, then just put the seeds in one of those pouches and seal it up.
If you truly are convnced they will catch you just send them home right before you leave in the seam of some jeans. Same method but no plane atleast.