Get some rhubarb too, asparagus and globe artichokes … these are perennial vegetables, cropping in March to May for rhubarb, May/June for artichokes and asparagus.
Potatoes will have something by then if planted early in February. Carrots will be forming, again sown as early as possible. Shallots and garlic can be planted in February. Broad beans can be sown in Februray or October. Spring cabbage can be put in in September and picked in April/May. Autumn onion sets can be planted out in September for June following.