Live Oak in USDA Zone 7(a)

Well, she made it through a cold spell in January, a long, sudden cold snap of about 10°F at the end of February, and several hard frosts through the whole month of March. Now she's pushing buds. It seems 7(a) is tolerable for this little Live Oak.

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I am in 7b and have 2 live oaks planted in 2018 they both have grown 20-40% per year since then

I’m in 7(a), so a little bit colder. The seedling was growing strong over the summer. Hopefully, I won’t see dieback as a result of the Christmas Cold Snap. It definitely damaged the leaves, but live oaks shed their leaves every spring anyway. The seller noted on the website that the seedling might have some escarpment live oak genetics mixed in, and those are supposed to be a bit more cold hardy, if I recall correctly.
 
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Has anyone from Maryland or Northern Virginia or Delaware succeeded in growing a Live Oak in their yard? Is Zone 8 a hard northernmost limit on their range? I read a paper about some university researchers working at a Boston Arboretum trying to grow them from seed up north (kinda like the strains of cedar of Lebanon that they found in Turkey that can grow in zone 6). It'll be a while before they have any results (if at all). In the mean time, I'm looking for anecdotal sources. I'd love to find an individual specimen that's just a bit more cold hardy than average and plant it on a wind-sheltered, south-facing hillside with nutrient-rich, well-drained soil, but I'm not certain that will work on the Eastern Shore of Maryland, especially since I'm near the Pennsylvania line. I'd love to hear your thoughts, or perhaps recommendations on establishing a cold-hardy cultivar if none exists.
I don't know what zone Portland OR is but it is widely cultivated as city landscape trees there. I'm in NJ in zone 7a and love this tree, I have a seedling I've been growing since getting a few acorns down in Hilton Head where we vacation every summer. I started it with the intention to make a bonsai, but now I'm playing with the idea of planting it for a landscape tree so id be interested to know if you attempted to grow one in your similar climate to mine. any success?
 
I’m in 7(a), so a little bit colder. The seedling was growing strong over the summer. Hopefully, I won’t see dieback as a result of the Christmas Cold Snap. It definitely damaged the leaves, but live oaks shed their leaves every spring anyway. The seller noted on the website that the seedling might have some escarpment live oak genetics mixed in, and those are supposed to be a bit more cold hardy, if I recall correctly.
Hows it faring 2 years on? very interested in this post
 
As far as I can tell, it's still alive. We'll see this spring how it fared over this unusually cold January. The leaves are burned from the frost, but the buds appear healthy, and the twigs are still supple and springy.
 
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