Last year my blossoms and fruit buds fell off my trees eventhough I have citrus so this year I've been spraying the leaves with liquid Kelp which was said to hold the fruit and this year have a ton of blooms as well as new growth and is getting greener which stayed so yellow for years. We had some strange weather this year and especially for your area. Anything's worth a try..

debbysunshine you are applying your fertilizer through the foliage, are you also fertilizing the soil? Citrus need large amounts of nitrogen to maintain the dark green foliage and leaf size. They also require micro nutrients such as zinc and iron. For this reason it is generally best to choose a citrus labeled complete fertilizer and follow the application rates and frequency recommendations on the bag. Al

I would reevaluta what and how much of the lear curl medicine you gave it.