Jujubes- Our New Adventure

Bob,
Emotionally :confounded:. I should not have done the acid spray on open flowers with temp in the 90 for 3 days in a row. It was a stupid move on my part. The impact on the trees was that the acid burn wiped out 95% of the blooming flowers from all my jujbe trees esp. the big 3, HJ, SC and Shanxi Li.

Honestly, it was like getting hit by late frost killing flowers buds. The only difference for this gibberellic disaster was that it happened in June, not March or April.

This year, all trees have tons of blooms. They must have saved lot of energy from last year.

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Since a couple of my stubborn jujube rootstocks were acting like persimmon, this year it was off with their heads… and arms and legs. They could either accept their new heads or die. They chose life :slight_smile:

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I took a look at the forecast and decided that tonight was better than waiting a day.

image

I made up 1.9L of mixture:
0.08g of GA3 → 42ppm
5.4g of Borax → 0.3%

Very similar to the mix from last year (45ppm and 0.3%, per my post on 7/4/21). I think I sprayed more onto each tree though- in the past I used a finer setting, while this time I shot a stream of it. Also of note- the trees were still a bit wet from earlier in the evening. No more is forecast, but it does mean that the GA3 probably got a bit further diluted on the tree.

I used up the entire amount on:
GA866 (with large Vegas Booty & Dae Sol Jo grafts)
Sherwood (with several smaller grafts)
Multi-graft Sugar Cane / Bok Jo / Tae Sang Wang
Russia #2
Mango Dong
Coco
2/3 of Sugar Cane & several grafts including Qiyuexian
Fuicuimi
So (medium sized by mailbox)

And one large branch of the big So:

It has quite a few flowers:

I’m tempted to spray another branch just before the 85-90F days start, just to see if the same thing happens for me, at these concentration levels.

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One thing I find strange about that is why you didn’t get a later set of fruit. Some of the fruit I harvested late in the season (end of October) was just flowers at the start of August. In addition to the current flowers getting crisped, did you stop getting new flowers? I would have thought that there was enough time (1+ months) for new flowers to open.

Here’s a pic from the end of August of newly formed fruit. It was a bit rushed to be ripe at the end of October and wasn’t of the highest quality, but it was OK.

I managed to catch a pic of a much larger wasp…and it was much more interested in the jujube flowers, so it didn’t catch me :slight_smile:

This is the kind of graft that generally makes it through the winter:

If you measure how often a graft does WELL, then I am probably around there too. The ones that have already grow 1-2 feet are much more likely to make it through the next winter.

Bok Jo graft at a rental which has at least 1.5’ of new growth:

The kind to worry about are those with only fruiting laterals, like this one:

Sometimes the poorly growing grafts will pull though and later send up a nice new shoot, like this Tae Sang Wang graft on a tree I transplanted this spring. You can see where the graft grew 2-3 inches, then died back over the winter. But, a new bud developed and sent up a vertical shoot.

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This is a graft of La Fleur. It was a very slow starter to the point that I felt like it was not going to take but just had some growth on scion energy. I almost quit removing rootstock bud growth. And then it just took off.

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I started GA866 and Shanxi Li spring 2020… they are planted 5 ft apart.

Yesterday found these on my Shanx Li.

It is around 12 ft tall and the lower branches bloomed and now have fruit set… where the top of the tree is still blooming. Hopefully more fruit will set higher up too.

The GA866 is blooming nicely… but have not found any fruit set on it yet.

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If there was any late round of blooming last year, it was not noticeable, unfortunately. We only had a handful of jujube fruit last year.

Re. Grafting growth, you probably right about the type of growth indicating if they will survive our winter. Of the 7 grafts taken, only this Hatien Jade has this type of growth.

The rest are like this.

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I have a Honey Jar graft in it’s third year that is still only 10 inches long and has only produced deciduous flowering shoots. It is also on the top of the tree getting good light. It has set some fruit for the first time recently, but still no laterals or primary shoots. It was grafted on a newly planted Sugarcane, so that may be why it stalled out. A new Honey Jar graft this spring on the same tree is already much bigger, with several laterals. It’s starting to set fruit and growing fast.

Nice! And I’m also happy to see lots of growth on La Fleur, as it means you could have some wood available :slight_smile: I tried to graft it in 2018, but I only had 3 small pieces and made the poor decision to put one on a (not so healthy) tree that died and 2 on new rootstocks.

That’s good news- GA866 usually has noticeably fewer flowers than other jujube for me. It could be even better news for you if it isn’t actually GA866, as you’ve then got a much better shot at fruit :slight_smile:

Somewhat painful that the one which puts on growth is lower in the canopy (might need to cut back bigger branches to give it room to grow), while the 2nd pic looks to be at the top and didn’t send up any shoots.

Sometimes it takes a long time to send up a shoot. Aside from making sure it has good sun exposure and keeping the tree well fertilized and watered, I’m not sure what else can be done to encourage the process. Anyone have some ideas on it?

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La Fleur has a very interesting looking profile. It looks like there are many narrow leaves. I tried grafting it last year and it failed.

My La Fleur from a generous friend.

Sorry the pics were not clear. It is the twig in the middle of each pic.
Leaves are smaller and narrower than other varieties. Maybe, it could set fruit this year. There a lot of flowers but I have not seen much pollinators.

It was grafted a couple of years ago and it has not grown much because…… I grafted it low (mistake, I know).

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I had a small La Fleur that didn’t really grow well and then succumbed to our vortex. I grafted 3 grafts of it this year and all of them have taken and grown well so I will quite a bit to share. One graft I accidentally knocked off when it was 3-4 inches long and it immediately put back another strong upright that has nearly a foot of growth.

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@BobVance… both of my Jujube’s put on lots of blossoms last year (second summer planted)… but last year neither set any fruit.

This year they are both covered in blossoms again… I have found several fruit set on the Shanxi Li… and checked them both again just now… found this one on the Shanxi Li (not sure how I missed that one) yesterday… It is quite large compared to the others.

Also just checked the (what is supposed to be GA 866) and found a couple of tiny friut set on it too. Pretty sure that is the start of little jujubes…

Sounds like you have some experience with GA 866 and are thinking mine may be mislabeled and that may be a good thing. If blooming in year 2 and setting fruit in year 3 is not at all like a GA 866… you may be right. I have no idea. It would be good to know what I do have, if it turns out not to be GA 866. Perhaps seeing the fruit fully developed will help ID it.

TNHunter

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The GA 866 fruit can have some small variations in shape, but it is pretty consistent in length-

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@castanea - those are nice sized fruit. Thanks for the Pic.

Hopefully mine will mature a few this year and I can compare. We are having a extra hot summer so far… may be a good summer for GA 866… if that is what I have.

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I got a good sized GA866 from Trees of Antiquity in 2016 and planted it in a full sun location next to my driveway. Now, 7 years later and it has still never produced a single fruit. I’ve gotten fruit for several years off of a graft on it (Dae Sol Jo), so it isn’t the tree being weak or non-productive, just the cultivar. I’m fine keeping it almost indefinitely out of curiosity if it will ever produce. And because I have enough productive jujubes that I won’t be hurt by its non-productivity. But, if it was one of 2 trees, I’d want something like Honey Jar, Sugar Cane, or So.

I should mention that Shanxi Li has taken a while to produce decent fruit (I planted 2 in 2016 (also from ToA) and last year was the first year I got more than a few fruit off either tree). In several years, it has dropped a lot of unripe fruit half-way through the summer, so don’t get too excited about the early fruit set (as I have with mine…).

I went around and checked grafts at home (I missed a few trees- I can update tomorrow) and at a couple rentals. I only counted established, in-ground (no pots) hosts.

Location Fail Decidous only Shoot %Fail %Shoot
Home 5 19 16 12.5% 45.6%
…Home Self Source 0 10 11 0.0% 52.4%
…Home GF 1 4 3 12.5% 42.1%
…Home Bought 4 5 2 36.4% 27.2%
2 Rentals 1 9 9 5.3% 49.9%
Total 6 28 25 10.2% 47.1%

While 90% are alive, only 47% have a vertical shoot, with the rest just having the deciduous fruiting branches.

One other trend I noticed is that the source of the scionwood seemed to impact both failure and shoot generation. Stuff I cut myself was best, likely because it didn’t need to go through the mail. Stuff from other Growing Fruit members was almost as good. But the wood I paid for had much higher failure rates (0% vs 12% vs 36%) and lower shoot rates (52% vs 42% vs 27%). Now, the Elk Grove hurt the commercial stats, as it added 2 failures, but even excluding that the failure rate was almost 2X that of GF sent wood.

The wood from Castanea and Tippy was very good. Tippy’s deserves special note, as it was re-gifted (Heitian Jade), so it went through the mail twice and still managed 3 shoots in 3 tries.

Another trend- medium-thin and and smaller (thin, very thin, tiny, etc) wood was much less likely to have a vertical shoot vs Medium-Lg and Large wood (2/13 = 15% vs 6/13 = 46% vs 10/19 = 53%). I’m guessing that the thinner wood was from laterals, while the thicker wood was from primary shoots. So while the failure rate was very low for all 3 (no more than 8%), the thicker wood is more likely to generate a shoot which has a better chance to survive the winter.

Edit:
At another rental (the one where I got the only take for Elk Grove), I was 10/10 on grafts. But anything smaller than medium was all deciduous growth only (5/5) and 4 of the 5 thicker scions are sending up vertical shoots.

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You are so right Bob about large scionwoods that sent up vertical shoot. I top worked my 12 years old sugarcane due to bitter taste in the skin of the fruit to HJ, Heiten Jade. They are taking off like almost 2 feet already.

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Within a day or two of saying that, I noticed a massive fruitset on Shanxi Li. No other jujus have any fruitlets yet, other than a few on Tae Sang Wang. But Shanxi Li has soon many that I’m sure many (most?) will drop off…

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To my disappointment, I have hardly seen any flying insects on my jujube trees. I have only seen a couple of dark wasps and a couple of small bees. That’s it! I have three 12 ft tall jujube trees in a row that are blooming profusely.

Where are those pollinators!!!

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I’ve seen a decent number of pollinators. Maybe not quite as many as in the past, but I think it will be enough to get the job done. I love the grape soda smell they make…

An update on Shanxi Li- I checked the other Shanxi Li which was planted at the same time (2016) and from the same source and it has no fruitset. A few differences:
1.) The tree with fruitset is:
a.) larger
b.) gets slightly more sun, though the smaller one gets mostly full sun
2.) I dug up a tree 5’ to the North of the larger tree (a 2016 Li) and transplanted it to a rental this spring. I wonder if I accidentally did some root pruning and it triggered a reaction

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