I've had curling leaves on mine (also Persian) for the last year or more. I think I was told it was a cosmetic thing, not harmful.
I don't like pesticides so I haven't sprayed anything.

I have a tree full of baby lime-lets, the most since planting 3 years ago.

I'll wait to see what anyone else says about the problem.

Have you fertilized your tree?
It's the right time.
After the blossoms finish you can spray it with minor elements.
They like that.
New leaves are generally a lighter green/chartreuse. So maybe there is no problem.

Thanks treefrog and naplesgardener for your feedback. I will soon be fertilizing--on March 13th. The citrus person at our extension service told me that in order to stimulate flowering over vegetative growth to cut back on the package recommendations and use only a handful of fertilizer per year of growth, plus one handful of Epsom salts.

In terms of spraying with micronutrients or minor elements, how does that work? Do you have a brand name?

Many thanks again.

I agree with your guy's recommendations.
Minimal fertilizer, epsom salts good for a magnesium boost.
I used Southern Ag Citrus Nutritional Spray this year. On everything in the yard. There are other brands I've used in past years. Minor elements, magnesium, manganese, boron, zinc, sulfur, and others. You spray it on vigorously growing young flushes of growth or on deficient looking leaves. Everything loves it! Drench them well.
Spring is the best time to do it.
Be forewarned, it will stain concrete and house walls, so rinse these areas if you've sprayed it on it.

treefrog, where do you get this spray?

Thanks,
Evelyn

Treefrong told me it's called Citrus nutritional spray available at HD or Lowes or any good garden center.

HD. Chelated Citrus Nutritional Spray.
There's a palm one too that's got more manganese.
They're both good.

great, thanks, I will get this spray today.

Evelyn