Seems like whats happening is they were are low on nutrients, started showing the signs(mainly yellow leaves from not having enough nitrogen) especially now that its blooming it uses more. You noticed and were hoping it was just lacking water and added even more which if anything probably made matters worse by keeping the roots from absorbing what little if any nutrients are left if any from the miracle grow soil. Of course this just speculation and my theory of whats going on, considering Im assuming that they have not been feed besides what nutrients were in the potting soil. If there were the case I would let the soil get back to how you had it and FEED it!!

Here are some pictures of the plant I was concerned about: I've also noticed the leaves on most all of my toms are getting a leathery texture and curling a bit. This is my first time growing tomatoes so I have no idea if this is normal. These are pictures of my sweet millions and cherokee purple, they seem to be growing like weeds but I'm a bit obsessed. Thanks for any input! Those were the sweet millions, then again on my CHerokee Purple I see the leaves getting leathery and kind of curling.

"Watering 2-3 times a week" can still be too much if the plants don't need it. The soil moisture content determines when the plant needs water, not any set schedule. If the soil down at the root level is kept too wet then the roots rot and the leaves turn yellow. Learn to stick your fingers deep into the soil to check for moisture before watering. And every time you water the nutrients wash out of the container with the water. Container plants need regular and consistent feedings to replace the lost nutrients. Spikes aren't going to provide that for long. Organic fertilizers only work if there is enough soil bacteria to convert them to a useable form for the plant. In containers filled with sterile potting mix there is little if any soil bacteria. Dave

I wouldn't fret too much about some yellow leaves here and there. Your toms look fine to me. My toms can sometimes look pretty shabby as the season progresses. That said, you want to avoid killing it with kindness. You might be getting some fried roots with a small black pot in direct sun. Water might not be penetrating the newspaper barrier on top of the soil. Tomatoes are resilient enough and do well enough if we just leverage their will to live. :) I grow toms year round in EarthBoxes using Dr Earth organic tom & veg fertilizer (5-7-4). One of the tenets of organic gardening is the use of water insoluble forms on nitrogen (Dr Earth fits the bill). Weekly/weakly fish emulsion and such is fine as well as a supplement, but not necessary. Organic EarthBox tomatoes: