I don't think it's anything to be worried about.

Shell 6A

Thanks Linda. That's great news. I guess I'll stick with what I'm doing, then.

Thanks KFG. I guess I'm over-fretting. Just starting off and everything is exciting/worrying!

if you believe you are over-doing something then chances are, you are. ;)
believe it or not, plants are intelligent enough to know when it's almost bed time in that they often droop down towards the end of the day, so it's normal for them to look a little sad later in the day.. i suppose it's their way of relaxing and getting ready to "hit the sack" as they absorbed all that energy and go to rest after a long day in the sun.

Yeah, a few mistakes made with many still to be made, I'm sure. Just glad they've been correctable so far.

Now that I think about it, my plants were droopy first thing in the morning. Perhaps they were just late risers {LOL}. Then again, perhaps they were waiting for the temp to warm up.....

Linda

+1 that this is just something normal tomato plants do. If the leaves are rolled, look small, or look distorted, then it's time to worry. If the compound leaves tighten up and/or droop during various parts of the day, that's usually just their reactions to light and temp conditions.

Thanks--I've noticed some cupping of the leaves here and there, but based on the ebb and flow of the curling, it sounds like I'm just noticing a normal plant's reaction to light/temps

Mine curl down and look kind of purple when it's too cold.

I think yours is just transplant shock and they will come around soon. Color is good. The curly parts aren't twisty like a virus or discolored. Look underneath the leaves and on the stems to make sure u don't have aphids. And if you don't I think time will take care of it

Last years Drought and extreme Heat here in the Carolinas...mine did the same thing....even with extra water. Still got tomatoes. I think we will be seeing this more and more with Hotter summers.

Thanks for the responses. The issue has resolved itself over the past week, so it seems like I can count out disease (phew!). The plant to the left below is the same one as the first picture in the original post.

Many of the tomatoes are starting to get flowers, which is exciting.

I still don’t know whether the leaf curling was regular behavior, over-watering/fertilization, or maybe even the wind or heat as suggested. Hopefully it doesn't come back, but if it does, I'll be interested to find out what triggers it.

A lot of environmental triggers are beyond our control and kind of a mystery because they can happen in response to a lot of different things. Some things, for example, happen in response to both underwatering AND overwatering. Tomatoes are a bit of a Goldilocks plant. They like things just so and will make a display of sulking with their foliage frequently if they don't like the temp, the amount of water they're getting, the humidity they're experiencing, etc. They'll go on strike by dropping flowers and refusing to set fruit if the weather is too hot or too cold. All if this, while not ideal, is more or less normal behavior for them.

The good news is, they're also pretty resilient in that they grow back and/or recover well when they suffer an environmental insult, and it takes a lot of environmental damage to outright kill them.

Also, leaf curl, epinasty, physiological leaf roll, etc. caused by environmental factors generally has very little affect on the plant. What you want to do is find out whether the stress is something you can 1) identify and 2) fix. Often, you can't fix it. And, often, you can't definitively identify what the stress is because it could be any combination of multiple factors. But there's no real reason to stress over fixing leaf curl for its own sake. If there's something obvious, like you have been overwatering your plants, that's something to fix, certainly. And if your beds don't drain well, that's something to look into fixing in preparation for future growing seasons. But much of the time, the biggest effect of leaf curl, epinasty, physiological leaf roll is to annoy you aesthetically while production and overall plant health aren't very affected at all.