Three new plants have tips yellowing like this.
No sign of insects or anything else to explain the tip color.
Anyone know what is going on with these plants?

My plants are beginning to suffer from heat stress, due to the abnormally high temps for several days in a row. And for most of the southeastern US, this will continue for at least another week, with little chance of rain. Irrigating more frequently than usual helps here, but when temps so drastically move to the scorching level, I don't know any way to prevent it altogether. I was in South GA yesterday looking at Scott Elliott's garden and temps were in a he 100 s with no rain in sight for at least a week. HIs daylilies looked great, amazing foliage. We talked about water, and he is very lucky to have a deep aquifer well that enables him to water a lot. HE tries not to let the ground dry out when the heat is like this. Water makes all the difference. I've seen it many times in the best gardens.

I agree ours yellow when thirsty

Thanks so much Julie for your response. I really appreciate it.

Since these are new plants, they receive water as needed. Keeping
a watchful eye on them.

You mentioned the heat, and that could be the problem. No rain
here either, and we do need it. Even I feel like the sun's rays are
a bit too much. Feels like the sun is burning me, although I am
well covered with hat and long sleeves.

Think I will try shading these plants for awhile, and see if that helps.

Digger, thanks, good to know. I'll see what I can do to relieve
the heat stress for the plant. It certainly stresses me.

Shirlee,
You mentioned that it is a new plant. If you recently planted it, it may be best to trim the leaves just a little. Yellowing is expected on a newly transplanted daylily.

Thanks Sue, it is a new plant, but not recently planted.
These plants, 3 so far, have already passed the yellowing stage of transplantation, and grown new green leaves from the center. That's why I am concerned about it.

It was growing beautifully, and all of a sudden, the plants began
to yellow at the leaf tips. The leaves are also a lighter color overall than before.

I've placed white cheese cloth about 2.5 feet above the plants for shade. There is still good air circulation. Now it is a wait and see. Other than that, and to continue regular watering, I'm at a loss. Per Julie's experience, I am adding more water
than usual. I thought it might be beneficial to soak the entire bed instead of
watering each of these by hand. With the hot temps, I think the watered areas
could be siphoned off by possible drier soil around them.

I haven't seen this type of thing before so am unsure as to what the problem is.
Looked all over the net trying to find something similar to no avail, which is why
I'm asking here.

Really appreciate the replies, and the help. Thanks so much.

I hope they recover for you Shirlee.

What is the material around them, is it a mulch or is the bed or planting hole amended with it?

Drat! WIth the additional information you gave (about the plants having had time to settle in) I should caution you to be alert for rot. That usually is accompanied by a distinctive unpleasant odor. Rot can happen with extreme high temps and low lying or badly drained areas with over watering. Sort of a lose lose. If a plant begins to rot, it is difficult to save it. If you discern any unpleasant odor around it, dig it up at once, soak it in a 10% bleach solution and let it dry out completely. If there are any mushy parts, cut them or scrape them off. . Let plant dry out completely. Then I'd replant it in a pot temporarily Using sterile potting mix and keep it shaded , watering sparingly until it shows signs of recovery. It probably isn't rot, but it doesn't hurt to know about it just in case. Usually doesn't happen here a lot, especially at this time of year, but sometimes with new plants, high temps and lots of water.... people in TX know more about this, as they have times in late summer whenthis can become a huge problem.

Sue, the flowers are mulched with pine bark, lightly.
The soil in the bed is very good, and grows plants well with years
of amendments. Since the time of the above photo, I pulled the
mulch away from the base of the plants a bit.

Julie, I dug down around the worst plant, and the roots look good,
and there is no foul odor. Don't think there is any rot. If so, my finger
would have encountered some mushy smelly stuff.

Maybe in a few more days, I will see some improvement, hopefully.
Admittedly, I'm like an ole mother hen over these plants.
Thanks so much Julie, Digger, Sue, and Sue (Sooby) for the help.

Hey guys and gals, I'm happy to report that the
plants in question are doing so much better.
Evidently, it was due to the hot, dry days. Providing
shade and watering the entire bed instead of just the plant helped.
Thanks all