[greeneyes]

See my post 39. I put my dwarf lemon tree in a container which I move indoors during freezing weather. We have too many periods of prolonged freezing temps to do other wise.

But in Texas, I would think your temps are more moderate in the winter, so I might try a few other things. For example:

If you planted your tree outside, where it received a southern exposure and had a retaining wall on the north, east, and west, the sun would heat up the rocks or concrete and that heat would disapate during the night.

If your tree was a dwarf tree, you could do even more to protect it. I have read that some people put trees in a protected location and wrap the base during cold weather.

Then there's the old 100 watt bulb heatilator. My patio has outdoor electrical outlets. I have been thinking about rigging up some sort of box with a glass window to absorb sun and warmth during the day and using the light for heat at night.

Trouble is, plants need a certain amount of dark to grow, and I haven't brainstormed through that as yet.LOL

[Sarajevo]

We usually get a freeze in January or February, but it can remain quite chilly through March also. ,br> I have 6 citrus trees remaining that were planted in the ground. The Flying Dragon variety does the best since It's slow growing. The Ponderosa Lemon, Calamundin, and Meyer Lemon will die back soon. We also have a Pomelo that is semi-covered in our front enclosure. It seems to be doing well, but then again, it has a north facing exposure. The remaining couple citrus are in large pots, but 17°F for two weeks is rough on anything.
It's strange though because a neighbor nearby has a large Ponderosa Lemon tree in the ground that produces a batch of lemons every couple years.