Yellow leaf help
Hi HAPPY HOLIDAYS! I think that I may have a problem. My tree started to get lemons in Sept & now has babies & even is getting buds. The tree is now inside for winter near a sliding door so it gets light & is warm, it is also on a plant caddy so it is not on the floor. I am having some trouble figuring out a new watering routine. I now water every 3 on 4 days. The nursery said to keep it moist. Last week I began to get 3 yellowing leaves. When that happened in the past it meant too much water. The leaf at that time turned completely yellow & fell off. I changed the watering routine. That was in summer. I reduced water this time & the bottom 2 leaves fell off so I thought all was well but today I noticed that the yellow is moving up the tree. Any ideas? I got the tree in June & have never fertilized because I can see it in the pot.