Have they had any fertilizer? If not, please give them some.

That plant is waiting to be fed some fertilizers. Give em some!

I was wondering what kind of soil prep did you do and what fertilizer program you follow... also if you hardened off your seedlings

Insufficient nutrients and over-watering are the most common causes of the yellowing of older leaves such as in your photo.

Dave

No, I didn't harden off the seedlings, but they were on a sunny windowsill before coming outside. I have not fertilized them yet so if it's as simple as that, whew! I've watered them each evening but not a lot because we've had rain. I usually use Miracle Gro for all vegetables, etc. is that what you all use? It seems to work well other years. Just have to get out there and buy some.

Tomatoes need about 1 inch of rain per week, and do better with weekly (or 2-3 times/week if really hot and dry but that's it, 3 is really pushing it) deep watering. Daily shallow watering just encourages shallow roots. It definitely looks like overwatering.

I don't know anything about MG for vegetables - what are the NPK numbers? You want something lower in N otherwise you'll get all foliage and no fruit.

Containers will need more frequent watering and fertilizing than in-ground.

The fact that they were on a sunny window sill is irrelevant to planting them outside, sorry. It is a radical change in environment as far as the plant is concerned so hardening off is required.

And watering them "each evening" is definitely way over-watering, even if there had been no rain. That results in shallow rooted, water-dependent plants. In ground plants, assuming the soil is even half way decent, do well with watering every 5-8 days except maybe in the high heat of summer in the deep south.

I usually use Miracle Gro for all vegetables, etc. is that what you all use?

Fertilizer is your choice but your plants are in dire need of something. Based on the many discussions about fertilizers here (search will pull them up for you), no MG is not high on the list of preferred fertilizers. Personally I think there are hundreds of better nutrient choices available.

Dave

Thanks, I'll do some research on fertilizers on here and see what I come up with. I didn't realize I was over watering them and wouldn't you know it's been raining all day today! I guess that will do them for about a week, for the ones that are in-ground. There are several in containers that look healthier than these. I only planted them outside Memorial day weekend, so I still have a chance to help them thrive.

My personal choices right now will be liquid ferts such as Neptune Fish and Neptune seaweed. I would not touch MG even if was free but that is just me.

Yep, it's time for fertilizer. MG works just fine. I don't know why it is so often badmouthed.

Jim

I ordered some Neptune's fish and seaweed fertilizer and it will be here tomorrow. We had 5 days straight of rain here so there wasn't much I could do about the over watering problem. Can't wait for the Neptune's to get here so I can apply some to my hungry plants - hopefully that was the problem. I'll let you know how they do.
Thanks for your answers.

What's wrong with MG? Is it a dislike of the company, or is the product bad in some way?

>> What's wrong with MG?

Big target. Miracle Gro is Scotts which is joined at the hip with Monsanto (Round-up), the biggest middle finger chemical company on the planet.

I won't use it, but there's nothing wrong with it. It's just chemicals, as is all its competitors. If someone won't use it or any other chemical fertilizer either, that's fanaticism. My kind of fanaticism, actually.

If someone won't use it but will use another chemical fertilizer, that's only unfounded bias. To single out MG is stupid.