Posted: 18/05/2013 at 21:28
You can, but the leaves will probably turn purple/red then die. Best to sow thinly or in paper tubes, not toilet rolls though because they don't break down and can turn fungal or slimy - put me right off when it came time to eat them.
If direct sowing, I find that by putting a clear flattened out bag over the top aids germination - keeps the moisture better. Same with parsnips.