What nutritional deficiency is this? It is in a pot.
I have found that identifying nutrient deficiency quite difficult because they often look similar. My guess re. your plant is magnesium deficiency. What do you think?
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I wondered about that or I thought maybe iron. Nothing else having a problem. Maybe repotting would cure it.
Guess I could throw some epsom salts on it and some iron tone if it didnāt get better. 
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one of our old juju trees actually had that condition, strangely though it manifested solely on the wild-type rootstockās leaves , whereas all the leaves of several specimens grafted to the rootstock were normal. Not exactly sure what caused the malady. Thankf8ully it was a transient thing and didnāt recur the following year.
Is your pH high? Iron, manganese, zinc and others are less available when pH is high.
Check out interveinal chlorosis to see if matches what you see.
This is just in a pot and itās been in the same pot for several years. So Iām just going to repot it and see because nothing else is having this problem.
Iāve been moving my seedlings outside. At the same time, Iāve also be re-potting them, generally moving up to 1 gal pots.
Hereās some that may be killed. I transplanted them anyway and I think there is a decent chance at least some will come back.
I had issues with my light setup in terms of watering. Instead of 10 hours, Iād sometimes forget and leave it on for 15+ hours, which really dries things out. Also with different pot sizes, it seems like some would need water before others, etc. Also, some were in trays which caught and kept the water near the pot, where it could get re-absorbed, while other trays drained into channels. Sometimes Iād feel one or two and think it didnāt need watering, when other pots were actually dry.
On the other hand, some did pretty well. Here is a Texas Tart:
I only planted 3 seeds from So (all in the same pot) and 2 of them germinated. One has the classic zig-zag pattern and the other looks pretty straight.
I havenāt started any more yet, but I think I will get cracking today 
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There IS a decent chance some will come back. I have had trees that are in amongst a sprinkler system in the same size pots and one may be dry as a bone while others around it are fine. I think leaf overhang is partially to blame making an umbrella over the pot. When I have some Iām trying to save I set their pot in a pan of water and just keep water on the roots for at least a week or twoāuntil I see new leaves emerging. I know it goes against everything we know about well draining soil but I have revived many that way and they never have symptoms of over watering. Sometimes I forget about them and find them still sitting in water weeks later and they are growing well. When I first started growing seedlings I was so afraid to over water them but I donāt think it can easily be done.
Iām out here sweating between thunderstorms trying to get my potting mix done to start my seedlings. Pours rain EVERY weekend.
The living ones you have look very healthy. I just grafted 2 of 3 yesterday. I cut down to the main stem and grafted. No ānurse branchā. I might kill both this way !!!
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I think so as well, especially since some of the others look to have come back- mostly brown leaves, with a few new green ones at the top. I didnāt include closeups of them, but it looks like something similar may have happened to the So on the right. Of course, there is only so many times they can do that, so I figured that it was time to get them outside and into bigger pots. The forecast lows for the next 10 days only get down to ~46F.
Maybe with jujubes, but I managed to kill 3-4 of the nicest/largest tomato seedlings that way. I didnāt realize that the tray under it was filling with water until too late. Even after I started draining them properly, they never came back.
I wonder if this ties into the Australian guy whose son planted a bunch of his jujubes in straight manure and had them do well. I donāt think Iāve heard of anyone growing jujubes in swampy ground, but maybe it is worth a try.
I want Panzao so badly but have been unable to get graft to take.
Most likely that main stem will sprout back out if the graft does not take.
I hope so. I hope there will be some blind buds along that remaining trunk.
Overwatering seedlings is a way to kill them in my experience. Underwatering is better than overwatering my seedlings (not jujubes)
Re. the son of the Australian guy who planted jujubes in pure manure, did he say the manure was wet? I remember his soil was on a dry side.
Granted you do not live in a very hot and dry area. Underwatering here is much more deadly. We are accustomed to our own climate and our practices follow our needs.
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My experience is mostly in a control environment, a grow tent with lighting. A little wilt from underwatering is fine. Overwatering is usually caused root rot and dead.
It is too cold here to start seedlings outside 
That matches what happened to my tomatoes, but it sounds like jujubes may be able to take it better.
He said it was hot/un-aged, but I donāt know how wet it was. Either way, it sounds like jujube can take tougher conditions than most plants.
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Iāve been doing a lot of grafting over the last month and a bit. About 250 grafts, almost half of them are jujubes.
Iāve been pleasantly surprised to see a lot of the grafts which didnāt grow at all last year (just leaf laterals) are awake again this year. No guarantee that they will develop a vertical shoot, but it is good to see that they didnāt die over the winter, as often happens with grafts that donāt grow.
Here are 3 āJunā grafts from last year. It is one that I didnāt get any shoots from, but it looks like all 3 are back. Regrettably, Iāve since heard that Jun is more of a drying cultivar.
Looks like a small Vegas Honey bark graft from last year is still kicking too.
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I had several grafts last year that just threw fruiting stems for growth. I think all, or nearly all of them are putting out primary shoots this year. Itās encouraging to see. Hopefully all of yours with put some upright growth out.
Iāve regrafted a couple and may do a few more but all my juju grafting is basically done. Iāve had some good takes but not a lot of new varieties.
I finally got my seeds planted this year. Itās been a funny weather year with grafting starting early and still too cool for starting seeds. Iāve put 1200 seeds in to hatch. I hope to end up with 300-400 nice seedlings.
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Very organized. Wish you great success!!
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