The Tropical Fruit Forum
Citrus => Cold Hardy Citrus => Topic started by: Ilya11 on October 18, 2018, 02:41:56 PM
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A very promising cold hardy hybrid produced by B.Voss in Hamburg.
It is believed to have C.ichangensis and Poncirus as parents. Leaves are mostly monofoliate and that is why I think that the story is more complex, could be citrumeloxichangesnsis.
My plant is now more than 2 m high, planted in 2012, never protected, never damaged.
Dozens of rather large pear-sharpen fruits.
(https://b.radikal.ru/b21/1810/d9/4a52f5709225.jpg) (https://radikal.ru)
Skin is pleasantly lemon-like, although not strongly scented, albedo is moderately bitter, no poncirus taste or odor.
Around 20 large, ichangensis-like seeds.
(https://a.radikal.ru/a20/1810/67/453ee52c5d60.jpg) (https://radikal.ru)
Moderately juicy, less bitter than grapefruit, rather acid, but less than lemon.
Some fruity aftertaste is faintly present, but is is very different from poncirus.
Amazingly, at this stage the juice already contains a lot of sugar: 11.5° of Brix, approximately the same as commercial clementines.
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Interesting.
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Sounds wonderful. More pulp to seed ratio than poncyrus means potentially more useful. I have some ichangensis seedlings with some trifoliate leaves ; I hope they grow to make nice fruit like yours.
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Beware, It is not very hardy despite its parents.
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I have a small plant that only just flowered for the first time.
Various accounts concerning hardiness differ greatly, I've read between -9 and -18C...
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I can confirm that N1tri has good frost hardiness.
Last year I planted it inground to see what happens. For the winter covered it with white agrotextile. Winter proved hard, with a minimum of -21 C.
(https://images89.fotosik.pl/18/5107f68aeb225b74m.jpg) (https://www.fotosik.pl/zdjecie/5107f68aeb225b74)
After the winter N1tri was severely damaged but some wood survived. I dug it out and planted again to a pot.
(https://images90.fotosik.pl/16/184585bd4752f03am.jpg) (https://www.fotosik.pl/zdjecie/184585bd4752f03a) (https://images91.fotosik.pl/19/78e8efedef8c649cm.jpg) (https://www.fotosik.pl/zdjecie/78e8efedef8c649c) (https://images89.fotosik.pl/18/d083ff4bcbaf2eb0m.jpg) (https://www.fotosik.pl/zdjecie/d083ff4bcbaf2eb0)
It has recovered fast and is in good condition now. Bark crack is still visible, but healing.
(https://images91.fotosik.pl/59/801bb26d44c66361m.jpg) (https://www.fotosik.pl/zdjecie/801bb26d44c66361) (https://images89.fotosik.pl/58/8165b08d6dca7836m.jpg) (https://www.fotosik.pl/zdjecie/8165b08d6dca7836)
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The photos show well the problem. It is not the green parts like in other citrus, it is the bark of old branches that split.
And it depends very much on the sap state. Some years it can look very hardy and some years it is very week.
One of my N1tri is much bigger than yours and this year it lost half of its branches by cork splitting.
This winter was very mild but we had -8°C (17°F) at the end of february. It nearly killed the tall N1tri but did nothing to the small ones that still have green branches.
This is why some people say it is hardy and some say it is not.
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Yes, cracking of the bark was the main problem.
I wonder how does N1tri compare to Ichang papeda in frost hardiness. I have a small grafted IVIA ichangensis, maybe I'll test it inground when it gets older.
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Sylvain,
It could be something connected with late summer growth.
As a rule I remove all new growth appearing after the middle of August. As you know I am hundreds kilometers North to you , this winter had -9.6C for several nights and 10 days without soil defreze. Some damage to Yuzus, but not even leaves loss on N1tri.
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I shall try that.
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My potted N1Tri has flowered for the first time this year and I thought all the flowers had dropped but today, I discovered this tiny fruit.
(https://i.postimg.cc/D4SyGV59/20181103-091946.jpg) (https://postimg.cc/D4SyGV59)
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The photos show well the problem. It is not the green parts like in other citrus, it is the bark of old branches that split.
And it depends very much on the sap state. Some years it can look very hardy and some years it is very week.
One of my N1tri is much bigger than yours and this year it lost half of its branches by cork splitting.
This winter was very mild but we had -8°C (17°F) at the end of february. It nearly killed the tall N1tri but did nothing to the small ones that still have green branches.
This is why some people say it is hardy and some say it is not.
Perhaps you could wrap the older thicker branches in insulation. Plastic bubble wrap.
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Florian, Ilya11
today I found this thread and I got a brainstorm.
From the description of the plant, pictures of the leaves and description and pictures of the fruits I have compared with my portfolio....I have a plant that is actually not N1triVoss, the rest of your description would exactly fit. It is much older than N1triVoss began to existing. So I have an assumption....
I add some flower Pictures of my plant, which shows very Special flowers.
Can you please compare them to the flowers of your plants N1triVoss, and give a Feedback? Maybe you can add Pictures of your flowering plant.
(https://i.postimg.cc/9DRmfjX9/DSC05862.jpg) (https://postimg.cc/9DRmfjX9)
(https://i.postimg.cc/47Bk58NZ/DSC05863.jpg) (https://postimg.cc/47Bk58NZ)
(https://i.postimg.cc/BLqf2W3M/DSC05864.jpg) (https://postimg.cc/BLqf2W3M)
(https://i.postimg.cc/sQnqSvwg/DSC05865.jpg) (https://postimg.cc/sQnqSvwg)
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Usirius, the flowers on your plant look very similar to these of citrangequat 4 saisons.
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For whatever it's worth, I have a little N1tri seedling.
It doesn't look the best and hasn't been growing well or growing very fast.
(https://i.postimg.cc/QVJxPbMD/20190503-144432.jpg) (https://postimg.cc/QVJxPbMD)
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Usirius,
It certainly not a N1tri that I have, both flowers and leaves are very different, my plant is about to start to flower now:
(https://b.radikal.ru/b01/1905/72/daccc1c66cd4.jpg) (https://radikal.ru)
(https://a.radikal.ru/a22/1905/97/7914c1d4fcf7.jpg) (https://radikal.ru)
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@All, thanks for your comments.
What I think - according to the description of the fruits and leafes....I have bought this plant called "Citrangequat" for about 25 years ago - from nthe ursery PAICHI GARDEN in Spain. This Show es described pear shaped fruits - with similar taste and the leafes are also as described. It show nearly no thorns, and Poncirus is not to seen in the Habitus. By luck it Show one bifoliate leaf in one or two years.
In the the Moment I have no fruit available for taking a picture.
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Recently I received seeds of N1tri from Ilya. Here are some seedlings
(https://live.staticflickr.com/65535/32830214527_732ec6197d_z.jpg) (https://flic.kr/p/S26qZv)N1tri F2 (https://flic.kr/p/S26qZv) by michaelbasso (https://www.flickr.com/photos/12996730@N08/), on Flickr
(https://live.staticflickr.com/65535/46857433895_e33a017378_z.jpg) (https://flic.kr/p/2eoCABi)N1tri F2 c (https://flic.kr/p/2eoCABi) by michaelbasso (https://www.flickr.com/photos/12996730@N08/), on Flickr(https://live.staticflickr.com/65535/32830214607_2c2e8b63a7_z.jpg) (https://flic.kr/p/S26r1T)N1tri F2 b (https://flic.kr/p/S26r1T) by michaelbasso (https://www.flickr.com/photos/12996730@N08/), on Flickr
leaves are different from palnt to plant, mostly monofoliate but some are more or less trifoliate. Some are bi or trilobed like e.g. Passiflora leaves.
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Recently I received seeds of N1tri from Ilya. Here are some seedlings
(https://live.staticflickr.com/65535/32830214527_732ec6197d_z.jpg) (https://flic.kr/p/S26qZv)N1tri F2 (https://flic.kr/p/S26qZv) by michaelbasso (https://www.flickr.com/photos/12996730@N08/), on Flickr
(https://live.staticflickr.com/65535/46857433895_e33a017378_z.jpg) (https://flic.kr/p/2eoCABi)N1tri F2 c (https://flic.kr/p/2eoCABi) by michaelbasso (https://www.flickr.com/photos/12996730@N08/), on Flickr(https://live.staticflickr.com/65535/32830214607_2c2e8b63a7_z.jpg) (https://flic.kr/p/S26r1T)N1tri F2 b (https://flic.kr/p/S26r1T) by michaelbasso (https://www.flickr.com/photos/12996730@N08/), on Flickr
leaves are different from palnt to plant, mostly monofoliate but some are more or less trifoliate. Some are bi or trilobed like e.g. Passiflora leaves.
Do you know the pollen source or were they open pollinated?
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The seeds came from Ilya. I guess it was open pollination.
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Those were the seeds from open pollinated N1tri. Nearby I have 5star, Morton and Ichangquat. Castrated and isolated flowers of N1tri gave seedless fruits.
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Anyone have a source for plants or seeds for this in the states? I have been looking to no avail and would love to add this to my collection.
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5 month old seedling N1 Tri Voss has first flower :). I had got N1 Tri Voss fruits from Petr Broza, he is growing N1 Tri Voss in big greenhouse with many other citrus varieties, so this seedling may be also hybrid from open pollination...
(https://i.postimg.cc/k2F1VqpT/N1-Tri-Voss-seedling-first-flower.jpg) (https://postimg.cc/k2F1VqpT)
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I found at least 3 very early flowering seedlings of N1tri from open pollination. None of them have ever bloomed again.
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This grapefruit-like early flowering on the top of stem growth occurs often in N1tri seedlings.
It is one of the reasons why I believe that this variety is a a hybrid of ichangensis with some sort of citrumelo.
These flowers are giving very rarely fruits because the whole plant at this stage is rather weak.
But if you cut them near the ground, there is a chance that new emerging growths will flower on the tops next spring.
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I found three N1Tri Voss seedlings with "trifoliate only" leaves from 36 seedlings. No one from these looks like pure poncirus, they have longer leaves like some F1 poncirus hybrid.
(https://i.postimg.cc/D86Bk7RK/N1-tri-Voss-seedling-with-trifoliate-l.jpg) (https://postimg.cc/D86Bk7RK)
If one parents of N1 Tri Voss was Poncirus, I would expect more seedlings with trifoliate leaves in F2 generation and maybe some with leaves like pure poncirus... it looks like pollen parent of N1Tri Voss may be citrumelo or other poncirus F1 hybrid...
But if you cut them near the ground, there is a chance that new emerging growths will flower on the tops next spring.
I may try cut it next spring and cutted stem graft to some strong rootstock, I am not sure where to cut it, below first pair of leaves or above?
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Just above the first pair of true leaves.
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for whatever it's worth, here's my little seedling from N1tri
(https://i.postimg.cc/xqxsDLj5/20200720-151311.jpg) (https://postimg.cc/xqxsDLj5)
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Just above the first pair of true leaves.
I`ll try that too. I have some precocious ichangensis seedlings too. Might be also worth a try.
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5 month old seedling N1 Tri Voss has first flower :). I had got N1 Tri Voss fruits from Petr Broza, he is growing N1 Tri Voss in big greenhouse with many other citrus varieties, so this seedling may be also hybrid from open pollination...
(https://i.postimg.cc/k2F1VqpT/N1-Tri-Voss-seedling-first-flower.jpg) (https://postimg.cc/k2F1VqpT)
This seedling has a second flower right now...is it also common? I thought that these one year old seedlings have only one flower...Now I have a dilemma, cut it or not in the next spring :)
(https://i.postimg.cc/34cJgdtt/N1-Tri-Voss-second-flower.jpg) (https://postimg.cc/34cJgdtt)
The first flower was a little more developed than the second, so no positive progress unfortunately...
(https://i.postimg.cc/vxs22v2T/N1-Tri-Vossfirst-flower.jpg) (https://postimg.cc/vxs22v2T)
(https://i.postimg.cc/876kLpvH/N1-Tri-Voss-second-flower-9-2020.jpg) (https://postimg.cc/876kLpvH)
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The flowers on my N1tri seedlings were at the tips of the shoots and were normally formed. But I never had a second flower on such a plant.
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In 2017 one of the N1tri seedlings made a tiny fruit
(https://live.staticflickr.com/65535/50462750027_1cb562684a_z.jpg) (https://flic.kr/p/2jTdMug)
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Here's my seedling grown from N1tri
(https://i.postimg.cc/jWYnrBTx/20201102-130642.jpg) (https://postimg.cc/jWYnrBTx)
sorry for the low quality of the picture
I noticed some of the leaves do not have winged petioles.
This could be a second generation offspring, so there is the possibility of some improvement.
I recently planted it in the ground, outside up against the wall.
I decided to simply label it "Ichang papeda x trifoliate hybrid", since there wasn't enough space on the tag for something more detailed. at least this way someone else might have a better idea what this is if they find it.
picture taken November 2, 2020
Olympia, WA, climate zone 8a
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I got N1triVoss four or five years ago as budwood, grafted a bud onto a very tiny Poncirus seedling and have now a still small but well growing bush. Leaves were always monofoliate. But this year, some trifoliate leaves appeared. Here some pictures.
First nomal monofoliate leaves:
(https://i.postimg.cc/s1mtFQm0/100-3133.jpg) (https://postimg.cc/s1mtFQm0)
At the end of the twig trifoliate leaves:
(https://i.postimg.cc/1f514c4Q/100-3130.jpg) (https://postimg.cc/1f514c4Q)
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Very cool variety. Would love to be able to find a source of this located within the US.
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I am looking for fruits or seeds of N1triVoss. I could send fruits or seeds Ichang papeda klon Klock or Hana yuzu (Eisenhut).
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5 month old seedling N1 Tri Voss has first flower :). I had got N1 Tri Voss fruits from Petr Broza, he is growing N1 Tri Voss in big greenhouse with many other citrus varieties, so this seedling may be also hybrid from open pollination...
(https://i.postimg.cc/k2F1VqpT/N1-Tri-Voss-seedling-first-flower.jpg) (https://postimg.cc/k2F1VqpT)
This seedling has a second flower right now...is it also common? I thought that these one year old seedlings have only one flower...Now I have a dilemma, cut it or not in the next spring :)
(https://i.postimg.cc/34cJgdtt/N1-Tri-Voss-second-flower.jpg) (https://postimg.cc/34cJgdtt)
The first flower was a little more developed than the second, so no positive progress unfortunately...
(https://i.postimg.cc/vxs22v2T/N1-Tri-Vossfirst-flower.jpg) (https://postimg.cc/vxs22v2T)
(https://i.postimg.cc/876kLpvH/N1-Tri-Voss-second-flower-9-2020.jpg) (https://postimg.cc/876kLpvH)
This grapefruit-like early flowering on the top of stem growth occurs often in N1tri seedlings.
It is one of the reasons why I believe that this variety is a a hybrid of ichangensis with some sort of citrumelo.
These flowers are giving very rarely fruits because the whole plant at this stage is rather weak.
But if you cut them near the ground, there is a chance that new emerging growths will flower on the tops next spring.
I've cut the early flowering seedling as Ilya suggested and he was right :) cut seedling had two new branches with two flowers on the top, unfortunately, both flowers kind of dried off before were open.
I grafted cuttings to poncirus rootstock and there is no sign of flowers but it grows vigorously.
(https://i.postimg.cc/F745NQtY/n1trivoss-cut-seedling-and-grafted.jpg) (https://postimg.cc/F745NQtY)
(https://i.postimg.cc/SJ6XxqJ3/n1trivoss-pre.jpg) (https://postimg.cc/SJ6XxqJ3)
(https://i.postimg.cc/9zWXYTM8/N1tri-Voss-May-26-2021.jpg) (https://postimg.cc/9zWXYTM8)
(https://i.postimg.cc/njrRn02S/n1tri-Voss-flower.jpg) (https://postimg.cc/njrRn02S)
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The original precocious seedling N1Tri Voss F2 has a third flower on a new branch growing under the first pair of leaves, the flower is again incomplete... :(
(https://i.postimg.cc/RN5VrPq0/N1-3-V-F2-JB-Pre-lower-branch-flower-26-6-2021.jpg) (https://postimg.cc/RN5VrPq0)
(https://i.postimg.cc/xkS4nzMM/N1-3-V-F2-JB-Pre-flower-26-6-2021.jpg) (https://postimg.cc/xkS4nzMM)
Grafted plant on poncirus is 70 cm heigh and has two flowers too :)
(https://i.postimg.cc/VS32SVxr/N1-3-V-F2-JB-Pre-grafted-2-flowers-26-6-2021.jpg) (https://postimg.cc/VS32SVxr)
(https://i.postimg.cc/Q9ZhLCxy/N1-3-V-F2-JB-Pre-seedling-and-grafted-plant-26-6-2021.jpg) (https://postimg.cc/Q9ZhLCxy)
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Interesting that all flowers are on the top. Even the grafted ones.