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I have this Meyer lemon tree in a pot. The leaves are slowly but steadily falling off, and each little lemon turns completely black and falls off before it even grows to like a centimeter or two. What could I be doing wrong? I have a soil moisture meter and I only water it when the meter reads "dry". Could it be my grow light isn't right or isnt strong enough?
hm, the leaves are a bit dusty, I will definitely try cleaning them. As for temp, I am in the northeast so not too much I can do about it (temps are around 18c/65f). I just re-potted it into a larger pot than the one I bought it in, and added some fertilizer when I did that - I'm wondering if the other commenter is right and maybe its too much fertilizer
I think that is not the case, because if it would be over fertilized it would has some burned and brown leafs. If you still have doubts about over-fertilizing, you can water it a lot for once, to clean the excess of chemical materials.
OK, yeah when the leaves fall off they are either fully green or just a little bit yellow. I am always paranoid about over-watering, as I have definitely killed plants in the past this way (especially potted plants). But maybe I should do as you say and give it a one-time burst of water