My multicell container with Echinacea seeds was covered with a transparent nylon cover for several days, and I just removed it, and spotted an unusual thing. Take a look at this white stuff in the middle of this seedling:
There were three seeds in the cell - each seed was just placed on top of the soil and lightly patted. Two other Echinacea seeds that didn't start (yet) are visible in the photos as having paler brownish color.
Is this normal? Or some kind of fungal infection caused by excess moisture? If yes, is there a cure?
The exact name of the plant in question is Echinacea angustifolia.
Update after 5 or so days:
the "feather" seems to disappear after several spraying of water (that I must do in order to maintain the soil moisture)
I added a very small quantity of soil to this cell to provide better support for seedlings seed, that had been lifted a bit by the root
the same cell looks like this now:
- the same cell but from different view angle:
- other cells:
Update: I started a couple of seeds of a different Echinacea, Echinacea purpurea, and there is that same 'feather':
It looks Echinacea seedlings do have this fine hair, but, for example, I didn't see any traces of such hair in Rudbeckia seedlings (Rudbeckia is a close relative to Echinacea).
I noticed the similar, even stronger, effect in my Lupinus seedslings: