Posted: 20/02/2013 at 21:45
As Geoff has posted..It's still alittle early to sow most seeds, I'd be inclined to wait.
This doesn't answer your Q but If you really want to get ahead of the game with sowing seeds, and I'm thinking for next year, there are some flower seeds which can be sown July/August time and planted out Sept/Oct time to over winter, you would need to check the growing instructions on the packet for each variety. I did this with Foxglove, Bellis and Parsley ( and another but the labels blown away) Planted in a nursery bed, today was spent relocating them round the garden.
Sown Sept/Oct time,(depending where you live), sweetpea will over winter in the GH and I've also had success with cornflowers.