Tom seedlings

[bridget mc laughlin]

Why are the seed leaves turning yellow but the next set of leaves seem to be healthy enough

[Jeanied]

Bridget - it could be that the seed leaves have done their job and are fading away naturally. It all depends on when you sowed them, how tall the plants are now, and how you are feeding them (seed compost not being the most nutrition rich environment for a young plant),

[Paulottie]

Could be a few things...too cold at night or compost too wet are the most likely.
Where are they...unheated greenhouse?

or poss compost/atmosphere too dry for too long... if they are indoors with central heating

although no food is also a poss if they are bigger now as J said.

[bridget mc laughlin]

Thanks everyone for the advise

[gillian62]

What feed should you use in small seedlings in pots please?

[Shadylane]

You shouldn't need to feed em until they start flowering, the compost should have enough to keep them going until they outgrow the pot and you pot on to a bigger one.