Well, I'm not in Texas, and perhaps your local extension or Master Gardeners can give you more specifics, but in general, the Pink Variegated Eureka really is more of a novelty citrus, that what I would consider a cultivar grown for juice. They're pretty trees, but the lemons will be smaller, less juicy, and the tree will be significantly less vigorous. Lemons are less cold tolerant in general that mandarins, so I would make sure your lemon has good protection and in your blazing hot summers, some protection from afternoon sun if possible. My Variegated Pink Eureka lemon did fine through 5 days of nighttime low temps in the mid-twenties, but we had had several months of very chilly temps prior to that ridiculously cold temp run. The Clemnules should be fine to below 32 degrees for short periods without issue, especially if the temps have been colder for a period of time before a real cold dip. I am assuming both of these are going into the ground.

Patty S.

Very Helpful, I had thought the pink lemon might go that low in temp. We had temps of 26 degrees 3 years ago and it is rare. I can now plant the lemon in the front yard.
I think you are saying that your Lemon hardened somewhat to accept that low temp.
I was hoping for better or miracle news concerning the Clementine Nule - not wanting to baby it, but I am going to have to find a place in the back.
They come from Spain and are just not cold hardy.
It is funny that you can never find a low temperture for citrus varieties on the internet. Guess no one wants to be
held responsible.
Thanks So Much !!! Carol

Oh, no, the Clemnules will do better than any lemon, Carol. Manadarins all in general are more cold tolerant than most lemons (maybe with the exception of the Improved Meyer lemon). You won't need to baby the Clemnules, but you will have to think about where you place that Variegated Pink Eureka. It is variegated, so that's the fist thing you must take into consideration - hot afternoon sun may burn the leaves. Secondly, it's a lemon and not as cold tolerant. My Clemnules also came through that cold snap just fine. And yes, having some time for citrus to get used to cold temps by hardening off (the best that they can), will certainly bode better if you have a serious cold snap. Where you can get in trouble with citrus and cold temps is more in the early spring, when everyone has had a bit of a warm up, sap starts flowing, you start to see a flush and buds, and then you get a wicked cold snap. That's when we and commercial orchardists get worried about cold damage.

Patty S.

At about 27F, my Pink Eureka starts taking foliage damage. At 19F, even in a cold-frame, that damage becomes significant and extends to the thin branch-tips. That said, what a fantastic variety.

Josh

Boy, this is very interesting concerning The Clementine Orange - that it can take cold temps. I realize I have waited to post, but I would like to ask HoosierQuilt what type of cold snap did you have. How low were the temps.
According to what you say I should be able to plant the Clementine in the front yard since 26 degrees does not happen in Houston very often. Maybe they can handle lower temps once they get older. Thanks for all who responded to this post. Carol