Citrus × meyeri, Meyer Lemon. These nine are the second crop I’ve harvested from this tree over the winter. I pulled all the fruit off because I wanted to make more energy available for vegetative growth. This tree enjoys a nice microclimate on the south-facing side of the house. During cold snaps it’s moved into the garage for nights, or days too if it’s below freezing. Meyer lemon is tough as nails so long as kept outdoors in sun. I once had one drop all the leaves after enduring January snow and freezing weather, and it sprouted lush new growth after the temperature warmed up later in the year (not unlike a deciduous tree).