I know that there have been other threads about cold hardy citrus, but I decided to introduce this one with a more generic title so that it becomes a catch all for information about cold hardy citrus.
Above is a photo of my Lemon Frost lemon which of my citrus is doing the best so far. It has survived one winter here in SE Georgia with the help of Christmas lights. I cover my citrus trees in small incandescent Christmas lights, and so far here in Hardiness Zone 8B at least that seems to be enough with a painters tarp over the trees on cold nights.
Here are my thoughts on Lemon Frost so far. It’s about 1/4th lemon, 1/4th orange and 1/2 hardy tangerine. This year the lemons have generally had one or two seeds. They are tart but kind of sweet too. As they ripen they go from green to yellow to kind of gold / orange and to me look more like an orange than a lemon. They peel like a satsuma or tangerine. When they are orange ripe, they really are kind of sweet, sweeter than the Meyers lemons I’ve tried.
With the new government regulations on propagating and distributing citrus, the company that owns the rights to all the Texas A & M Frost Series Citrus has decided to get out of the citrus business, so this variety probably won’t be available for a while. The nursery where I got my Lemon Frost has heard a rumor that the rights to the Texas A & M Frost Series varieties have been bought by another nursery. I don’t have any information on this matter beyond that, and I don’t know when nursery stock of this variety will be available again commercially if ever. Thanks and God bless.