I can't tell for certain if this one is c. grandiflora , or c. tinctoria but the germination suggestion is the same for both....
Surface sow 70F or barely cover as some light may be beneficial to germination. Germination in approx. 7-14 days.

I don't know this particular coreopsis to be able to tell you if it comes true from seed, or even if it sets viable seed. Some of the named varieties coreopsis do not.

Here is a link that might be useful: coreopsis grandiflora ripe seed photo Seed Site

I beleive it's grandiflora variety. You can see pictures of the tag here. So I just take dried out flowers and drop it on top of soil I set up at home in cup and water it and cover with plastic wrap, sit next to window and possibly it will work?

Thanks,

This post was edited by artisticcheese on Tue, Jul 16, 13 at 9:42

A flower has lots of seeds in it. Let the flower dry on the plant, then rub the seeds out. I think the best way to propagate this plant would be by dividing in half. That's if it's big enough. You might have to plant it and wait a year.

A flower has lots of seeds in it. Let the flower dry on the plant, then rub the seeds out. I think the best way to propagate this plant would be by dividing in half. That's if it's big enough. You might have to plant it and wait a year.