I brought two pipes back from Amsterdam. I wore a pair of sport shorts under my jeans, had a glass pipe in each pocket of the shorts. This is when I was 16 guys, come on now.. These are seeds. Unless you're trying to smuggle thousands of seeds put them in your pocket or put them in a bag and tape it to your thigh. There's numerous ways, they cannot be found unless they strip search you. And personally I would not put incriminating things in my bag, because in an airport they are ALWAYS allowed to search your bag without reason but never your person without a reason.
Another thought, put them in a small Advil bottle or something. People won't think twice about it, it may also get through the x-ray but I wouldn't test it. Keep it on you.