Looks like magnesium deficiency. Are they growing in pots?

It is in a raised bed, square foot garden. I've had zucchini plants with magnesium deficiency before where the leaves turn yellow except for the veins. Do tomato plants show it differently with dark spots instead?

thanks

Jennifer,

Closely related to our other conversation on your friend's tomatoes...I have had leaves like that show up on plants which later ended up with the dead brown leaves I suspect now is advanced spider or russet mite damage. Just for safety's sake, I'd check the underside of those leaves with a magnifying glass to see if you notice any bugs.

IMHO that is definitely some kind of nutritional deficiency, probably magnesium as per the first poster.

Thanks guys. I will get some epsom salt ready and check for bugs.

Jennifer

One of my plants (Black from Tula )shows that on the lowest leaves. I believe it is nutrition related. But I feed all my plants the same thing, same time. At this stage in the season I am not worrying about it.

Sey