Hi, I'm looking for an educated opinion. I collected some yellow coneflower seeds when I was in Galveston TX for Christmas 2006. I haven't planted them yet and want to try some and trade the rest--but I'm not sure they are still viable. At the time I collected them some of the coneflowers were still blooming in the yard, others had gone to seed. They appear to be fine-but are now just over 2 years old. I don't know what cultivar they are, they had somewhat longish brown cones and thin petals and were yellow. I think my brother-in-law who owned the land perhaps sowed them as part of a wild appearing butterfly type garden area. This part of the yard was naturalized. I'm guessing they were from a plant that might be native in TX originally. Anyone have an idea if the seeds may still be viable a bit more than 2 years later? They were kept dry, in the dark at about room temp mainly.

Thanks for any tips/knowledge anyone can provide.