Hello, my lemon tree is not doing well this winter, leaves are getting yellow (with green spots, picture uploaded) and falling. It was growing nicely this summer, but leaves were never dark green, they were kinda light green even in the summer.
I keep one lemon still growing on the tree, don't know if that affects the tree. Also I should mention tree was heavily blooming, but I took my friends advice and picked all the flowers (he told me it sucks tree's growing juices).
Could you please help me identify this problem. I really hope picture helps you guys, cause I was googling my problem and there are a few possible reasons: roots too wet, lack of nitrogen, plant doesnt like place/temperatures and maybe something else, I dont remember now.
Thank you in advance!