If something is wrong in my grows, i mostly blame myself.....
thre aree a few pissibllities why she performs like that
your growmedium may be to hot for her ( with the cowmanure inside)... plants love it poor in the beginning
or they are more sensitive
as i dont know what the ec of your soilmix is...... and only you know your actions.. we cant solve that problem
there anrre lot of things possible, seeds too.