Posted: 16/05/2015 at 13:09
Were they 'hardened off' during that lovely warm week we had - and then the overall temperatures dropped the following week, especially overnight?
So although they'd been outside they'd not really adjusted to the lower temperatures
Even if you cover them now they'll have been set back. You might just as well sow some fresh ones - they'll catch up
Don't worry, we've all done it