When to pot up onion seedlings

[selfraising]

Hi
This is my first time of growing onions from seed. I have sown Long Red Florence onion seeds and they have now germinated. At what stage do I thin them out and pot them up?

[Flummery]

I usually wait till the bent over leaf has straightened up. I've just done it with mine and potted them into biggish modules, one per cell. They look pathetic! However, I know they'll fatten up.

[rustylady]

As Flum says, when the hook has straightened up. I would put them into small pots or modules of a cell tray and then pot on when the rooots have filled the container.

[selfraising]

Thanks Flum and Rustylady. At the moment they are in trays in a cooler part of the house. Once potted up, can I move them to my mini gh or would that be too cold for them?

[Flummery]

Mine are in the cold greenhouse now. They're farily tough.

[selfraising]

Thanks Flum, you're a star

[bramble]

If your short of space you can plant them out in clumps rather than singly as they will push apart and find their own space.