What we thought was a "China Doll" plant doesn't appear to be anything of the sort. It has small waxy leaves and small red flowers. It outgrew the garden window, and the leaves were getting rather yellow too.
In desparation I transplanted it into a larger pot and have it on the front porch out of direct sunlight. I keep the soil slightly damp. It seems to be much happier now, but I would like to confirm that I am doing the right things.
We are in San Jose, California. Temperatures are around 85F in the day and 55F at night.
