Here's my Atwood Navel which has been growing nicely without trouble lately. A few scant blooms which is insignificant while this rebounds after some neglect (I adopted this citrus).
Trouble is some, not all, of the new growth ends have flopped. This exposes the undersides of the new leaves rather than the right side up. I don't know what factors have contributed to this situation or if it's unhealthy. Watering has been routine and regimented. Daytime temps are in the 85°F - 95°F range and night temps have been in the 45°F - 55°F range.
All seems fine otherwise but what would cause this "flop" at some of the branch ends?

Cheers, Barrie.

I don't know what causes it, but it is not really a problem--I have had it happen to some of my trees--it usually just goes away in time.

My thoughts are the same as Skeet's. I have a Juanita tangerine, with some of its new growth presently up-side-down. Just leave your tree alone, and the tree will right the foliage by itself in time. As Skeet advises, it is really not a problem. - Millet (1,344-)

Rolling of the leaves and the pliable non-turgid leaves that can easily turn over are strong signs of water stress. Assuming that you are watering the plants properly, it could still likely be water stress due to the quicker pace of the season's progress before the plants are able to pick-up the pace. Sometimes when the season progresses quicker than the tree can re-activate or produce more roots to cope up, there is a temporary imbalance in the supply and demand of water. Then the tree adapts by rolling the leaves during radiation load, and then through time by growing more roots or dropping some leaves. Can happen in between growth flushes too and the tree recovers. To help plants rebound quicker, you may want to apply very diluted amounts of vitamin B12 once when you water.

Thanks everyone. So obviously not a huge concern. What will the B-12 do, help develop more roots?

Cheers, Barrie.

let me find my notes, but it has to do with reviving and encouraging more roots. I'm sure it is one of those vitamin B, I just can't recall the number. I have an informal trial on that one. Will post it as soon as I find my notes.

Dr. Manners has posted that citrus do not use applied vitamins, as citrus trees make their own vitamins. However, if I remember correctly, he did state that there could possibly be an exception for Vitamin B, but even then it is doubtful. If your interest you can look up Dr. Manners comments by using the search function. - Millet (1,342-)

I had no doubts because I helped my son on his science project about that one. We've had 25% more root biomass for those treated with vitamin B than the control. We tried several concoction, we had vitamin B1 and B12, citric acid, ascorbic acid, commercial rooting hormone, and then just plain water. I can't remember if it is the B1 or B12, so will have to find the poster in the garage. One of the vitamin B did no better than the control and the rooting hormone did slightly better than the control. We used C-35 citrange rootstock to test growth of citrus, and three replication per treatment, and as far as scientific setup goes, that is one valid experimental design. Of course those citruses were all grafted by now and given away. So for me, that the results are without a doubt.

The reason why we used citric and ascorbic acid is that the city water pH is over 8.0 and it helped improved the trees performances slightly.