That Dreaded Question...

[Peteyd]

Is this Blight??

[nickdub]

I don't think so - looks more like a deficiency of some kind. How often are you watering and what sort of feed are you using ?

[Peteyd]

Phew!

Watered daily once the Sun is off of them, No feed at the moment.

[Nicos]

Agree...nope!

[Greenleaves]

Phosphorus deficiency I think...I believe thats what purple means in plants

[Aberdeenplotter]

a foliar feed using a tomato feed should help

[Penellype]

Looks like magnesium deficiency to me. Tomatoes are very prone to this particularly if grown in pots or grow bags. Feed with tomato food, but don't expect the leaves that are already affected to recover - the feed will stop more of the plant being affected.

[nickdub]

Phew!

Watered daily once the Sun is off of them, No feed at the moment.

Might need a bit more frequent watering in sunny weather and definitely need feeding with some soluble fertiliser - spraying the leaves with something like dilute seaweed feed will also help while they recover.

[NatalieCooke]

Try Epsom salts too. I add it too every watering.

[It never rains..it pours]

Phosphorus deficiency I think...I believe thats what purple means in plants

I second Greenleaves, doesnt look like the normal magnesium deficiency that I get.

https://www.yara.co.uk/crop-nutritio...ency---tomato/