Thanks for your insight… looking at the pics of your tree and all the healthy leaves, I’m green with envy. 
@bleedingdirt suggested using a non-organic fertilizer instead of my EB Stone Organics granulated stuff… it seems like most gardeners who are successful with citrus agree. Curious, what fertilizer do you use?
Yup, I’ve been re-thinking the fertilizer for my citrus trees. I’ve been using the EB Stone Organics for all my fruit trees – it works great for my pears, cherries, and nectarines – most of my citrus are not thriving.
What fertilizer do you use?
I use this https://www.homedepot.com/p/Vigoro-3-5-lb-All-Season-Citrus-and-Avocado-Plant-Food-133244/203105913
Another option is to spray this in addition to fertilizing with a nitrogen heavy fertilizer
Southern Ag Chelated Citrus Nutritional Spray, 16 OZ https://smile.amazon.com/dp/B00A51Y8ZM/ref=cm_sw_r_cp_api_glt_i_QWYJ77QJ42JJ40EE76FD
This is what I use for my citrus:
Cool, great advice, I’m gonna try the spray and see how it goes, and consider the fertilizer. I’ll report back on how it went.
Wow, 14-4-8, that’s a heavy nitrogen balanced fertilizer. I’m gonna give this a try right away and see how it goes. Hope to report back with good news, thanks.
@bleedingdirt I purchased Southern Ag Nutritional Spray, thanks for your advice.
@brownmola I couldn’t find the Greenall fertilizer, but found something similar from Master Nursery. Will report on how it goes.
Sounds good! Let me know how it goes.
Gene, Does your golden nugget still look like the 2015 photos? Here’s a link to some good photos of citrus nutritional deficiencies:
https://edis.ifas.ufl.edu/publication/CH142
I wonder if you’ve checked the pH of the soil where it’s planted…if it’s way off it probably wouldn’t matter what kind of fertilizer you used.
It does still look light green, but my current feeling is that it’s due more from pests like leaf miners and thrips (thanks @Richard !). Nonetheless, I do spray with the Southern Ag Nutritional Spray 2-3 times in the winter and GreenAll FST annually.
Citrus leaf miners are easy to spot…the mines(tunnels) are very visible on the underside of the young leaves, and eventually the leaves end up twisted and ugly looking. They don’t mine the older hardened leaves, only the real young leaves from a flush. I’m only familiar with thrips on vegetable plants, but they leave visible light colored jagged lesions and with a good magnifier (10-15x) you can see their dark green excrement dots when they are active.
