Duane,
You are getting some great advice here on marketing your seedlings.
I don't know how big a display area you have, but something you may want to think about is to display an EarthTainer next to your plant racks. Something "different" to draw people into your booth can have a positive impact
The downside might be that you have to take time explaining to people what the darn thing does. Not a big problem if you have 2 people working your booth - - but again, something to keep in mind.
Also, I don't have an issue with individuals building EarthTainers for sale as they are somewhat complex to build and require good power tool hand - eye coordination which not everyone has. Again, in these tough economic times, any kind of revenue generating income is fair game. I just don't want some commercial operation to mass produce them for profit.
Let me know if you need any of the wicking baskets, wire rope clamps or other hard to find components. I have been buying these items in quantity and can help you out at my cost. Good luck with your venture!!
Ray