Flower seeds in packaging

Hi. A company I buy from is considering impregnating their cardboard packaging with flower seeds as not all packaging ends up in the recycling waste stream. They don’t know much about flowers so have asked customers what we think. I pointed out that shipping non native invasive species world wide might be problematic and suggested they look for a widely dispersed annual that occupies a specific niche and then dies back. I don’t want to be discouraging so does anyone have any suggestions for a flowering plant that might work?
Cheers,
Helen

Purple Coneflowers, Echinacea purpurea, are both beautiful and medicinal. They are also drought resistant.

Thanks Anne. I thought common Poppy might be ok. I will pass on your suggestion 🙂