They were there yesterday and I bet they will crop up tomorrow but today I spent twenty minutes in the dusk around sunset rewarded only by this tiny specimen hidden in the lawn too dark for my eyes...
Cerastium fontanum Hönsarv i september, i februari, i augusti och i mars Eva Ekeblad, 2000
The Mouse-ear Chickweed is one of the inveterate lawn-weeds: doesn't seem to need bare spots and is quite indifferent to the frequency of mowing
The mouse-eared chickweed did, indeed, turn up the next day - not in the lawn, but in a weedier patch.