I have about five or six really yellow lemons on my Meyer Lemon tree that is in a container in my living room, with about 14 more that haven't turned yet. I've read that the lemons turn an orangish color, so do I need to wait until they do that before picking them? I know that they won't ripen any more off the tree.

I would use them now. When Meyer lemons start to turn orange they get a of flavor to them. I use mine when they are not fully yellow. If you wait until they turn orange don't expect a very good lemon flavor.

I have experimented on Meyer lemons. I have a few that hang on the tree for almost a year before I have to use them. Anyway, I have left a few on my inground tree that turned yellow during fall, then during the winter, they turned yellow orange, a lot of them fall off, which I promptly used, but there were a few that remained until spring and as it warmed up, they turned back to yellow and as summer progresses, they turned pale yellow and then when the cool nights approaches in late summer, they turned bright yellow and yellow orange, just when I ran out of lemons, and so off from the tree.

They grew slightly bigger also. Granting that many of them naturally fell off when left longer, I couldn't say that they are really good keepers, but some of them did manage to hold on, for almost a year, and so, I would say plausible but not definite. Will try the experiment again.

You can use the Meyer lemon as soon as you see yellow in their skin.

I will start using them now. Thanks for the advice re. waiting too long.