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Messages - Zitrusgaertner

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Cold Hardy Citrus / Re: Citrandarin 899J (Bernhard Voss)
« on: August 07, 2019, 10:47:44 AM »
I have 899J in open ground, unprotected since 2004.
It is now more than 3 m tall, but has not fruited yet.
It was a rather shy grower, twig damage was evident after -12C, and recovery next season was very limited, but main trunk was never damaged and this plant survived a winter with -16C and two weeks of frozen soil.

Ilya, is yours grafted on PT? It seems that 899A and 899J are not really compatible with PT. 899A has a sharp shoulder where scion meets rootstock. With 899J it is a bit less obvious. Same effect can be seen with Kumquat on PT.

Cold Hardy Citrus / Re: Citrandarin 899J (Bernhard Voss)
« on: August 06, 2019, 04:17:32 PM »
Millet, it is quite clear what this fruit is -exept of one striking point. Bernhard got some fruits from a Hybrid Poncirus X Changsha when he visited Riverside or another USDA-Citrus -site. The Citrandarin 899 obviously produces zygotic seeds. Back home Bernhard planted the seeds of his 899-fruits. As open pollinated, he did not know -and nobody knew- what the F2 parents could have been. He named the seedllings 899A to... R(?) and tested their cold hardiness. Some of them survived. I own 899A, 899F, 899K? and 899J. Allof them have already flowered and I got some fruits. J was the last. Fruit of A tasted nice and was sweet. It is strictly  monofoliate. the others have trifoliate leaves and taste nasty. That is the story.

Cold Hardy Citrus / Citrandarin 899J (Bernhard Voss)
« on: August 06, 2019, 09:53:29 AM »
The very first fruit of Citrandarin 899J

Cold Hardy Citrus / Re: Grafting
« on: July 03, 2019, 04:29:29 PM »
use parafolm grafting tape. Since I have found this I am nearly 100% successful.

Cold Hardy Citrus / Re: Unknown citrus
« on: June 30, 2019, 04:26:43 PM »
Looks like some Citrumelo. Could be Trifolis....

Cold Hardy Citrus / Re: Juanita Tangerine
« on: June 28, 2019, 04:37:17 AM »
But Juanita is said to having survived 0F (-18C). Once…  ;)

Cold Hardy Citrus / Re: Grafted Citrus
« on: June 28, 2019, 04:35:02 AM »
and PT is resistant to CTV as far as I know

Cold Hardy Citrus / Re: Interesting japan citruses.
« on: June 02, 2019, 02:38:26 PM »
not available in Europe, I suppose  :-X

That's why I thought of C. ichangensis IVIA. My IVIA has dark purple flush. But it is marked YuzuXCitrumelo
Your new hybrids are very impressive. It is one of these that carries flowers?

and what about the colour of the flush of your 5StarXYuzu seedlings? Purple or green?

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: May 21, 2019, 03:31:37 AM »
Usirius, no, Bernhard has been a little bit out of Citrus in the last years. He has lost most of hir plants after a storm had damaged his greenhouse. I have spent some time with him last summer and last weekend I met him in Vienna at the "Wiener Zitrustage". I wonder what 899-variety you have. The rather hairy fruits look strange to me. I have 4 899-F2-hybrids but only with 2 of them I am sure about the correct marking. I have (for sure) 899A and 899J and (quite sure) 899F and (don't know) 899E or H. All are blooming. 899A has sweet, mandarin-like fruits. 899J did not bear fruits yet and the fruits of the rest are not edible.
899A is monofoliate, 899J aswell, F and H Show trifoliate leaves, but very few with the years.

You are right. I was misleaded by the dark purple colour of thje flush which reminded me strongly of my C. ichangensis IVIA. Same colour but trifoliate leaves. But it is CitrumeloXYuzu. Do you have it? Do you want it  ;) ?

I have a C. ichangensis X Citrumelo from Adavo (Adam Bajer) from Chech Rep. But it is trifoliate. Yours is not oviously.

Cold Hardy Citrus / Re: Some rare variety hardy seedlings
« on: May 09, 2019, 05:20:36 AM »
Lebming, great if it works, but I don't see the benefit except you need flowering PT The rootsystem will take a kongt time to take up with the one of a seedling I suppose.

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: April 22, 2019, 04:37:19 PM »
Don't think this is 899. Ihave four of them and none of them has flowers like the ones you show. They look like PT-flowers. I had an early blooming PT "Kryder" that produced Flowers with pink stamens.

Cold Hardy Citrus / Re: trying to root C. ichangensis
« on: April 04, 2019, 09:30:13 AM »
Mine worked fine. Easy to root.

Cold Hardy Citrus / Re: Citrus tachibana
« on: March 22, 2019, 11:26:28 AM »
Now I use reflecting foil. works well and protects the trunk from cold radiation aswell.

Cold Hardy Citrus / Re: Citrus tachibana
« on: March 22, 2019, 06:33:21 AM »

In any case it is a good idea to protect the trunk if high crafted on PT. Inversion is most likely linked to clear and sunny weather at day. The sun warms up the trunk which often results in severe cracks in the bark. Theses cracks often kill a tree. I had cracks on a high crafted Citrumelo and only PT trunk was affected. Citrumelo itself was not harmed at all. All cracks appeared on sun exposed parts. I was lucky my tree did not die but recovered quite well.

Cold Hardy Citrus / Re: Some rare variety hardy seedlings
« on: March 22, 2019, 06:08:41 AM »
C. ichangensis and Citrumelo root easily, Mandarins and PT do not. But I admit I never use any technical devices like root heating. Just stick Wood in the ground.

Cold Hardy Citrus / Re: Hardy citrus growing in Switzerland
« on: February 24, 2019, 02:27:56 PM »
I have 4 different 899-varities: A, E, F (or H) and J. All of them have flowered. A has spaeric fruits, sweet and mandarin-like. No off-taste-

Citrus General Discussion / Re: Help with Citrus Leaves
« on: February 18, 2019, 10:30:04 AM »
Imidacloprid is a bee-killer. Sorry.

Cold Hardy Citrus / Re: Hardy citrus growing in Switzerland
« on: January 25, 2019, 11:26:54 AM »
If we are really talking about clone 899A the fruit is good, very nice in fact. Sweet without any bittereness or resin aroma. All other clones I know are from my opinion not edible. My 899J has flowered oncein 2017. 899A flowered at least 7 years ago but mostly produces uncomplete "male" flowers.

Cold Hardy Citrus / Re: Hardy citrus growing in Switzerland
« on: January 25, 2019, 07:06:47 AM »
Maesy what is your HRS899a? Is ist the hybrid by Bernhard Voss? I would be very surprised if this variety would turn out to be that hardy. Do you have an adult plant that blooms?

Cold Hardy Citrus / Re: Graft chimeras and hardy citrus
« on: January 17, 2019, 05:27:44 AM »
I can't say if Prag is a chimera or not, but I can say, that it is very cold harda as a whole plant, but leaves are damaged at rather low temperatures. A closer look shows also, that parts of a leave's tissue die earlier than others. The second thig I can say for sure is, that it sometimes produces offshoots that are pure Poncirus. And -last but not least- Prag produces Satsuma-like fruit with no poncirin aftertaste and no bitterness at all.

Cold Hardy Citrus / Re: hybrids with precocious Poncirus
« on: January 17, 2019, 04:51:21 AM »
Mikkel, do I get you right? This FT gene sequence induces early blooming but does not effect fruit quality, size etc.? And it won't be transferred to a next generation? Neither via hybridisation nor via nucellar cloning?

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