blomma wrote: Pfg
Why do you feel you have to sprinkle something on top of tiny seeds. If I remember correctly, Penstemon seeds are very tiny. Too tiny to make it to the surface. When I sowed them, I never covered them. I used fine peatmoss and blended the seeds into it. I did that with all tiny seeds.
Another was is to make a furrow in the mix, then pour the seeds into the furrow. With your fingers, just bring the sides of the mix closer so they are in contact with the mix, yet not covered. I have done it that way for years until started using peatmoss.
Personally, I wouldn't bother using coir but thanks for the explanation. Walmart have the seed mix.
Below is this year's sowing of Daylilly seeds. Some purchased, others my own. All with Deno method.