Why use granular fertilizer every 2 weeks? Could easily be roots are damaged (burned) by high soluble salts -- i.e.: excess fert.

There are many people who recommend frequent fertilizing with container growing as nutrients are depleted throughout season and roots can't seek out nutrients in a wider area. I do believe you are correct though that this is probably fertilizer burn. I did some additional research and found many examples of fert burn that look just like mine. Orange Russian 117 has a more delicate leaf and perhaps the same amount of fert that has helped my other plants thrive, is too much for this wispy leafed plant. I will pull back on my fert and definitely use a lower nitrogen product for future feedings. Thanks Jean!! :)

Agree with Jean. Crispy edges are a dead giveaway for root problems, and your account points the finger squarely at overfertilizing.

Fertilizing frequently is necessary for container plants, but usually people recommend dilute liquid nutrients, which can be adjusted in frequency and strength much more easily to respond to how much water the plant is getting, i.e. you can fertilize in very dilute quantities to avoid root burn, and you can fertilize that way more frequently when you're watering more or less frequently when you don't need to water as much.

1/3 cup of granular every 2 weeks for a container is a lot. I personally wouldn't even give an in-ground plant that much granular fert, and in-ground plants have a much bigger tolerance for error.

This is my first year growing entirely in containers. I live in Los Angeles and my yard only allows me to grow in one area since trees from neighbor's yard shadows the rest of the yard. I've been growing in the same spot for 15 years and as much as I amend the soil every year, the soil needed a rest, so I'm growing in containers for a couple of years while I continue to replenish the soil's nutrients. I guess I got a little overzealous with the feeding.... I'll pull back a bit. The damage isn't too bad, so I think with a few waterings I'll be able to correct the over fert situation. This is good to know!! Thanks for the info Jean and Gor. I think I might switch to a liquid fert like Neptune's Harvest which has a lower NPK but still has necessary minerals. Thoughts?

Should be fine. Note that once flowering and fruiting happen, you may want to alternate between a veg/fruiting plant formula and a bloom formula.

I usually water container tomatoes with a 1/4 of the recommended dilution of fertilizer every 4th watering. Or, if there's been a lot of rain that keeps me from having to water, I give the plant a glug of the regular recommended dilution after a few episodes of heavy rain. Different people have different strategies. Some people fertilize 1x a week, for instance. Others constantly keep their irrigation water fertilized with low levels of liquid nutrients.