Citrus > Cold Hardy Citrus

Looking for information on Kishu and New Zealand Lemonade Tree

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Leif79:
I have spent some time trying to find the hardiness of these varieties. Is the Kishu like other mandarins and good to the mid teens or is it the mid 20s that some websites state?  Are any members growing Kishu outdoors in zone 8b?  The New Zealand Lemonade Tree has been even more difficult to find any hardiness information on.  A few websites gloss over it without really going into detail.  So I have the same question is it a mandarin hybrid good to the mid to high teens like the Meyer Lemon or is it like a more traditional lemon that can survive in the mid to high 20s.
I appreciate any responses.
Thanks Jasen

Millet:
Some say the NZ Lemonade tree is a hybrid between a lemon and a mandarin that first was crossed in Australia.  Other sites such as UCR say the parentage is unknown.  Most say it can be grown in USDA zones 8 to 10.  Never seen any information stated as an estimated  low temperature survive ability. The tree certainly is a very productive fruit bearer.

SoCal2warm:
There was a genetic study in Japan that showed that Kishu was one of the parents of Satsuma. Kishu probably has less cold hardiness than Satsuma, however, since it was likely the other parent (kunenbo, also believed to be the parent of Keraji and Bloomsweet) that conferred cold hardiness. My guess is that the cold hardiness of Kishu isn't anything special compared to other mandarin varieties, but mandarins as a group do tend to be fairly cold hardy, certainly more so than oranges.

Leif79:
Thanks for the replies looks like it will be trial by fire hope I dont burn the plants up to bad.  Good thing is I will be able to update next spring to let everyone know how well they did.

selkirk:
The last two winter's I reach 21F. The first year 80F one day the next 21F. This year we had a week of cold  weather before the 21F freeze. First year -Kishu 80% was defoliated, but still made a light crop. Fair sized NZ lemonade killed, this was the only citrus I lost. This year- Kishu 15% defoliated, looking good now.

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