At a citrus growers meeting several years ago, one of the most successful
Zone 8 growers stated that citrus trees die from desiccation more often than
they die from freezing. He suggested winter irrigation is more important
than trying to keep the trees in above freezing conditions. My potted lemon
tree is in full bloom but I bring it inside at 40ºF and water it often
especially if the leaves show any sign of drying. Smells nice.
Doc Lisenby
So. Car. Zone 8 (new map)