Late season fertilization issue
I have a late season fertilization issue. I have an in ground satsuma and it's leaves are starting to show signs of nutrient problems. I gave it a fertilization around labor day, but it was obviously too little. My dilemma is we are on the very very very upper zone of its winter tolerance and I do not want any potential new growth get winter damage nor do I want a hungry plant all winter. I feel like I am at a roulette table with my options and we know there are no winners in Vegas.
I am considering a little dose of fertilizer. In the past I have used a product for in ground citrus with a 2-3 time per year application. I I do give it a late season dose, would a water soluble product like my foliage pro be a better option?
Tree is of fruiting size. Last winter a sheet and pan of water kept it safe, but I could go with more of a temp greenhouse if needed.
Thanks for assistance.