Shallots are traditionally planted from sets ( very small shallots).

clump-of-shallots
They grow new bulbs in a cluster around the mother set, rather like a garlic clove.

using-walking-board-to-plant shallots
Plant as soon as soil is dry enough , in March or April.

pushing-shallot-in-ground
Use a trowel, unless soil very light, when sets can be pushed in, so that they are buried to half their depth & have their shoulders poking through. Plant 15cm (6in) apart with 30cm (12in) between rows.

shallot-out-of-bed
Check daily to make sure birds have not pulled them out. Push them back in if necessary. May be worth covering with a net if birds a problem.

hoe-shallots
Keep weeds down.

flopping&ready-to-harvest shallots
Lift or harvest shallots when leaves start to flop over & yellow, traditionally on the longest day. Leave them on the top of the soil to dry out, if it is dry & rain is not forecast, otherwise dry them under cover. There is no need to separate the clumps, they will fall apart naturally.
Storage: When dry, and the skins are shiny, store in trays, nets or tights in a cool, dry, well ventilated place. They should keep for 9 or 12 months.
Use shallots in cooking because they have a milder flavour than onions. They are good added whole to stews and casseroles.