Q.blood red orange and mandarin trees
live in tucson az.
my plants bloom and then the blossoms fell off. small trees, i’ve only had them for 2 years.
the leaves are a little yellow.
i just now, sept 3rd went to ace hardware and bought organic fertilizer and put this around the drip line.
is it too late to hope for fruit this winter !
thank you! maryanne

Yes, this does appear to be a fertilization issue, as well as possible underwatering. Be sure to keep the soil moist, and feed with a citrus fertilizer. Dolomitic Lime will help maintain proper pH levels in the soil as well. Here is a link that will help: https://www.gardeningknowhow.com/edible/fruits/citrus/fertilizing-citrus-trees-best-practices-for-citrus-fertilizing.htm