I had no idea there are many cold hardy citrus trees!
Lots that take temps as cold as 10 degrees.
http://mckenzie-farms.com/photo.htm
Couple I’m looking at... (but am a tightwad... mighty temptimg though.)
“Bitter Lemon: also known as the trifoliate orangeand poncirrus . Anyone wanting to grow citrus north of zone 7 should give bitter lemon a try. Trees are native of Asia and are extremely cold hardy. It has been reported that the bitter lemon tree will survive as far north as New England. Fruits are golf ball sized and the trees are decidious. Hardy to around - 5F
Price is 25 dollars per 1 gallon tree”
“Citrange: We offer several species of citrange. Citrange is a hybrid between sweet oranges and trifoliate orange.. These are very cold hardy and will grow and produce fruit where other citrus trees fail. Hardy to 0 F. We offer Benton, Rusk and Morton citranges as well as Citrandarins... a mandarinXtrifoliate hybrid.
Price is 25 dollars per 1 gallon tree”
https://en.wikipedia.org/wiki/Trifoliate_orange
" Trifolate orange: As food
The fruits are very bitter, due in part to their poncirin content. Most people consider them inedible fresh, but they can be made into marmalade.[8] When dried and powdered, they can be used as a condiment."
Note that like some locust trees they have thorns!
