Some vegetables are better sown directly at the spot where you want to grow them, for example, most of root vegetables or fennel. Seed potatoes, garlic bulbs and onion sets can also be planted straight in.
To start your seedings indoors, prepare seeds, seed compost, containers, labels, a marker and a trowel.
If you do not have seed compost, multi-purpose compost or finer potting compost can do the job too. You can also mix sand with garden soil, so the soil is lighter and airier, therefore better for growing seedings.
Then you will need two types of containers. The containers with drainage holes for sowing and the containers without drainage holes for the former ones to stand on to avoid water leaking though. If the pots are placed outside, you can skip the no drainage containers. If you do not have seed trays or pots, a good alternative is to recycle supermarket or vegetable delivery packagings. Some seeds, such as tomato, chilli and pepper seeds, germinate better in a propagator, transparent plastic containers can be up-cycled as a propagator lid.