This is a Cherokee Purple and it's growing in a pot. The tomatoes got blossom rot so I just gave it calcium yesterday but what's wrong with the leaves? Seems to just be on the bottom half of the plant. Do I need to remove the leaves? Any help/advice would be much appreciated!

The leaf at the bottom of the photo might have gotten a bit pinched by the seed coat. No problem. I've seen much worse damage to cotyledons. Of more concern is whether you planted in potting mix or dirt. This post was edited by missingtheobvious on Thu, Mar 21, 13 at 20:04

It is phosphorous deficiency and both of the fertilizers you are using are low phos so some additional supplement is needed. Soft rock phosphate is the quickest acting organic, a dose of MG the fasted synthetic solution.. You can Google pics of 'phosphorous deficiency in tomato plants' for pics to compare if you wish. As Linda said, it is difficult to grow organically in containers. There is no soil food web to feed the plants so you have to provide all the nutrients on a regular basis and during periods of heavy rain that often means weekly. Dave.

Judging from the last picture (posted 5 hours ago) I see the yellowing starts from the lower leaves. In my view, plant is just aborting those older leave to support the younger ones . I would think lack of nutrients associated with too much moisture ( due to rain, bad drainage/soil). But There is a possibility of disease as evidenced in the earlier photos , showing lesions. I would take Steve's advice : Trim off all the yellowing leaves, as the is no chance for them to revive. In the meantime the offer and open door for disease. Next step is to fungicide the plants Third, feed them !