Anything decent @ Home Depot??
Home Depot has a Vigro 6-4-6 with minor elements that is billed as citrus fertilizer, mango, avocado too. You can buy a cheap 10-10-10 at Walmart that has half the nitrogen as time release. I use this on some plants. There are no minor elements in it. If you have high alkaline soil I wonder how much of the minor elements are uptaked anyways in those more expensive fertilizers w minors. This is why many here resort to foliar spray fertilizers/supplements to supply the minors such as iron, copper, manganese, magnesium especially if they have alkakline soil
Lowes has Sunniland citrus fertilizer that is identical (or nearly so) to the Vigro at Home Depot mentioned above