Spring Onion Deedling Tips Going Yellow?

[Pippin]

Hi,

I am growing spring onions seedlings.

The tips have started to turn yellow.

Do they need nutrients or could you tell me why they are turning yellow?

[Flummery]

It depends how small they are when going yellow. A few of mine are beginning to turn at the tip - but they are being eaten (by us!) so they're quite mature. At a guess I'd say it might be lack of water (yes, I know it's been tipping down everywhere - but were they dry earlier in the season?)
They don't usually suffer from lack of nutrients but it wouldn't hurt to water with a general purpose - seaweed extract for instance.