yellowing on morning glories

[Lucifera]

I've grown some morning glories from seed; the plants are all still small but the first set of true leaves are all yellow round the edge. I've got them in permanent positions now - anyone know what the problem might be?

I've got a lot of plants doing this, I wonder whether it is just a touch too cold and windy still (perhaps at night?)

Leave 'em in and see

Probably lack of nutrients, or possibly a bit of dehydration if they had a bit of a dry patch when growing. just possible they've got a virus of some sort (Swine Flu in Morning Glories Shock!)

if they get reasonable weather morning glories are pretty robust - they should be fine now they're in the ground.

Ah, I wonder if it has been a bit too cold. Hope they haven't picked up a bug!! Thanks for advice, both.