Q: We have a Meyer lemon, three feet tall, indoors by a bright window. It is blooming profusely and producing lemons. But they get to the size of the tip of your little finger and fall off. Any ideas?
A: Small fruit dropping off a lemon tree might indicate lack of pollination. Indoor lemons don’t have the advantage of wind to shake the pollen loose. I have instructions on how to hand pollinate a Meyer lemon at http://www.walterreeves.com/gardening-q-and-a/meyer-lemon-hand-pollination/. Or you could take it outdoors for the summer.