lisbon lemon lemon question
My Lisbon lemon tree has always been healthy this is its first fall/winter outside the lowest low has been 55 so far. It has started to bloom now however a few of the older leaves have falling off maybe 5 or so over 2 weeks.The newer leaves are really dark green However the older ones are pale green to yellow veins with darker green leaf meat. I know about deficiency and use jacks citrus feed Epson salt and calmax mixed in low dose. So I don't feel its a deficiency my question is it the change in weather,the leaves are just old or am I worried for nothing.