Officially it’s the start of Spring, so during March you should be sowing seeds.
With veg, as long as the ground isn’t too wet and soggy, early sowings can be made by warming up the soil prior to sowing using cloches or envirofleece which will help to ensure good seed germination results.
As soon as soil conditions are suitable sowings can be made of artichoke, beetroot, broad bean, brussel sprouts, cabbage, cauliflower, carrot, lettuce, parsley and spinach. Sowings of aubergine and cucumber, along with other tender vegetables, can now be made in a heated greenhouse.
With flowers, half-hardy annuals such as ageratum, impatiens (busy lizzie), cosmea, gazania, petunia, lobelia and marigold can be sown in the heated greenhouse or indoors.