I start my peas by putting them in a damp container. When I see the root starting to grow I know which peas are viable and discard those which aren’t.
I plant the peas about 2.5cm (1 inch deep) in moist compost. Cover the pot to stop mice digging them up and eating them.
This time-lapse of pea seedlings shows what happens over a period of about 10 days.
When large enough to plant out, you should put supports in for your peas to climb up.
Filmed for my website http://www.rightplants4me.co.uk