Posted: 21/04/2012 at 08:09
They have true leaves, tattianna, so you can pot them up. Better than leaving them in the seed tray for another fortnight where their roots, hence their growth, will be restricted.
You can use individual 3" pots or similar with adequate drainage. Fill them with mix, get the mix nice and damp, then drill a hole with a screwdriver or 3" nail. Carefully remove the seedlings from the tray - I use a 3" nail to prise them clear - and lower them into the drilled holes. Plant them deeply, right down to the first true leaves. All the stem that is buried will develop into root structure. Tamp the mix around them to make sure there aren't any air pockets in the mix.
Now they need reasonable warmth but as much light as they can get. And tell your son not to water them until the mix dries out completely! The mix needs to dry out between waterings. Unless you get a bout of hot weather, they would probably need one watering while you're away.