Yellow spots on tomato leaves

[emarisa28]

Does anyone know what this marks are? I don't think they are leaf burn....

[Penellype]

My guess would be that the plants are starting to get a bit hungry - they are in quite small pots. Maybe give them a feed to prevent further discolouration (but don't expect the affected leaves to recover).

[nickdub]

Fully agree with Penellype, the main first thing is to get them potted on in to larger pots.
Not sure what's caused the spotting on the leaves, but it doesn't look serious and the plants should grow on fine. They also look a bit drawn up, which is likely to be a sign that they'd be better somewhere with more direct sunlight

[Jungle Jane]

It could’ve been caused from water crystals on the leaves from overnight water evaporation/condensation,then early morning sun,sometimes you can go around the plants & gently tap the leaves,could try to ventilate more with this warmth we’re having this week.

[WalterWhite]

It could’ve been caused from water crystals on the leaves from overnight water evaporation/condensation,then early morning sun,sometimes you can go around the plants & gently tap the leaves,could try to ventilate more with this warmth we’re having this week.

Known as Edema. Had this on chilli plants before.

Reduce relative humidity(RH)/improve circulation. Small fan lightly blowing will help alleviate the issue and also strengthen the stems to your plants.