I am getting conflicting information on how to treat coreopsis seeds. The seed packet from Stokes says to cover the seeds with fine soil. A website on how to grow coreopsis says to press the seeds into the soil and not cover them at all as they need light to germinate. So who's correct?
Coreopsis Seeds- To cover or not to cover
I would follow Stokes advise. They are one of the best seed companies out there. BTW what species/variety are you growing? Conditions needed will vary by species/variety/
Coreopsis seeds need to be covered very thin: 1/15th inch. They need some light to germinate, but they need a good contact with the soil.
I'm growing Coreopsis grandiflora var. Sunray. To cover my bases I covered part of the planting thinly and simply pressed the remainder of the seeds into the soil, lightly sprayed them, and then covered the pots with a piece of scrap glass to keep them from drying out. I sat the pots on a northeast facing windowsill and today after only 4 days, I already have seedlings! Stokes said to expect germination in about 20 days. A planting of Shasta daisy left uncovered and treated the same way is also germinating, again much earlier than expected. Thanks to Jonna and trc65 for your prompt replies. I love this website!