I am located about 30 miles North of Dallas in zone either 7 or 8 depending on where you look. I have a single plum, Methley, and am looking on adding 2 more. We definitely have issue with spring freezes (85 for a week then down to 30 for 3 days is not uncommon in the month of March.)
According to Texas A&M the varieties that work well in my area are:
Methley, Ozark Premier, Morris, Bruce, and Santa Rosa.
And also according to Texas A&M pluots are not recommended in Texas. Here is a quote from their document:
"Prunus Hybrids
Many Prunus hybrids are available,namely plum by apricot and vice versa;
commonly known as “plumcots,” “pluots,”or “apriums,” depending on the breeding
program that released them (Fig. 12).In Texas they have been disappointing.
So far none are winter hardy, all suffer from bacterial canker infestation, and few
have produced adequately. More breeding and development are needed before
they can be recommended for cultivation in Texas."
I am not a big fan of tart skin and I have heard the Santa Rosa has that. Anyone tried any of the others on the list, or have any other suggestions?