Cauliflower Walcheren

grew this for the first time and really good plants,
after this winter all the leaves have died just stalks left.
is this normal? do the leaves and head regrow b4 april ?

Yeah my PSB and winter leeks are done for, a whole week in December with temps not rising above -3c and down to -11c and then the low light we have at that time of year has done them in. At least we don't get that weather every year