@joanboston almost a year. I think it flowered last March. We get loads of flowers and loads of tiny lemons but then they fall off after about a fortnight. This is the only one that's stayed on. We've had the plant for about three years.
Sounds like ours! @stvnhwrd we've had it about ten months, it flowers, the fruit sets then drops off. We bought special citrus feed and water and feed as per instruction. Wish I knew where we are going wrong.
I've put the Lemon plant outside today. Hopefully we can get more than one lemon this year!