We're having a party in late May, hopefully in the garden. I want to plant a bunch of bedding stuff to brighten things up a bit, but not spend too much ££ as we are having building work later in the summer which will trash the garden. Any ideas about flowers with a bit of impact that I could grow from seed under a cloch or in a coldframe outside (I don't have room to do seedlings inside) or am I too late? Could grow on plug plants - but would these be in flower by end of May?