Parsley Petroselinum hortense

We've got two big pots of parsley from last year which are going to seed, and I've planted some from seed in two smaller pots which I'm hoping will come along fairly quickly and give us parsley for cooking, because picking the odd leaf off the stuff that's gone to seed is not very satisfying at all. If we can get parsley happening so that we always have some leafy and some seeding, that'd be nice.