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Messages - Zitrusgaertner

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Cold Hardy Citrus / Re: Poncirus fruit comparison
« on: December 07, 2020, 08:54:12 AM »
Jiri, a presence of underdeveloped seeds is probably a good sign of zygotic nature of this variety.
Have you also tried to germinated them? In some cases, liberated from testa they are able to give seedlings.

Ilya, will it be of any favour to remove the tegmen aswell? I know it is a delicate work to do so.


Cold Hardy Citrus / Re: Ichang papeda tasting / flavor
« on: October 21, 2020, 08:50:27 AM »
I suppose it is possible the tree was originally grown from a seed that came from an Ichang papeda, so genetic recombination, or hybridization is a possibility. It definitely did not have any bad Poncirus trifoliata flavors. And I could even eat the peel, which would be highly unlikely if it was a poncirus hybrid.
What has Citrus trifoliata to do with Citrus ichangensis? Why should Ichang papeda have Poncirus flavors? But what you have found is no Ichanng papeda. There is a Variety with round fruits and a juicy Pulp, but the fruits of Var. "IVIA" look quite different. Your fruits look like Yuzu as Laaz remarked.

« on: September 30, 2020, 05:52:37 AM »
Snowjunky why are you thinking Grapefruit was less hardy than Oranges? Hardyness depends on Variety. I know two real C. paradisi that can tolerate a minimum of -12°C. Do you know a comparable orange tree?

Citrus General Discussion / Re: Haydite
« on: September 17, 2020, 01:39:17 PM »
Haydite does not store nutrients therefor it is best for hydro-culture. Broken Haydite might be better. I prefer natural volcano-stuff. It contains several minerals and sulfur.

Cold Hardy Citrus / Re: Ichangensis froze to death, then bloomed.
« on: June 16, 2020, 08:21:12 AM »
Ichangensis (even the IVIA-clones) is quite hardy and can take down to -15°C. Of cause you have to protect young or newly planted trees in the first years (against winter sun for example) For me they do better on their own roots than they do on PT. But they have to establish well. Like all frost hardy citrus. That is essential.

Cold Hardy Citrus / Re: Hardy citrus growing in Switzerland
« on: June 02, 2020, 06:46:36 AM »
Thanks Florian for the posting. This hybrid actually seems to be one of the best hybrids selected so far. I will plant this one as well, I am still looking for a source of material (rice or plants). I have a copy of the Poncirus x Changsha seedlings that Bernhard Voss made in the early nineties. The version I have is tested hardy outdoors to -17°C without damage (it was not colder for me yet) and is reliably fruiting every year with fruits, whose skin has 1/3 to 1/4 Poncirin of Poncirus fruits, and the content not at all, pleasant citrus aroma, not sweet, but a bit tangerine-like, for juice, lemonade, jam in my opinion very suitable. I have posted about this several times already. One should take such selected hybrids as crossing partners for further breeding work...then maybe one day you will get a poncirin-free and yet hardy citrus!

Is your 899-Hybrid trifoliate or monofoliate? I have 4 of them. 899A and 899J are monofoliate. 899F an 899H are not. All of them flower.

Cold Hardy Citrus / Re: Citsuma Prague
« on: May 14, 2020, 08:21:54 AM »
this "Chimerer Prage" is very different from mine. Where do the winged petioles come from? The leaves resume some Yuzu or other C.ichagensis hybrid. Very strange!

Cold Hardy Citrus / Re: Poncirus fruit comparison
« on: January 23, 2020, 08:16:21 AM »
Fruit quality of Poncirus seems to vary a lot from year to year. My fruits of 2019 were quite good (Zdenek said, they were the best he had ever tasted). After two weeks of storing there was quite much juice and very few bitterness in it. We had a very long summer and autumn ended with November or the fist week of December. Maybe the fruits are better when they are riper? We had almost no frost until Christmas and the last fruit of Citrumelo 5* I took home was only as bitter as a normal white grapefruit and had also some sweetness.

« on: December 04, 2019, 10:37:01 AM »
If you seek cold hardy grapefruit go for some russian types like Gruszevednij or try to get hands on Enzo or Welker.  ;)

Cold Hardy Citrus / Re: Looking for Scions
« on: November 28, 2019, 06:42:27 AM »
Interstock crafting is often recommended as a stragedy to get a seedling to erly blooming. But never tried by myself.

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: November 21, 2019, 06:22:17 AM »
They may look nice but they won't taste nice  ;)

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: November 19, 2019, 03:52:36 AM »

This is my 852 with fruits. Pictures taken last Saturday.

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: November 19, 2019, 03:48:47 AM »
so there is one that drops leaves and might be of better quality?

Cold Hardy Citrus / Re: Unknown citrus
« on: November 19, 2019, 03:46:24 AM »
My 852 has serrated leaves that are rather rough. Not that smooth and shiny.

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: November 18, 2019, 04:09:05 AM »
Ilya, does your Citrumelo 5* drop leaves in late autumn? Mine keeps ist leaves over winter. Some of cause die but about 50% survive in a merely mild winter. Trifolis, which is said to be F2 and less hardy, changes colour and drops some leaves. Most hardy PT hybrids seem to drop leaves but also keeps some. Also leaves on my yuzu turn yellow and drop off. Not sure how many of them will get lost.

Cold Hardy Citrus / Re: Hardy citrus growing in Switzerland
« on: November 15, 2019, 07:13:11 AM »
Bernhard Voss update
He does not work in his pottery any more but takes care of a big Citrus Collection and still works as an arborist. His nursery was damaged during a storm and he did not rebuild the tunnel. But you can meet him at the Vienna citrus-fair (Wiener Zitrustage) in Schönbrunn Castle im Vienna.

Cold Hardy Citrus / Re: Hardy citrus growing in Switzerland
« on: October 25, 2019, 10:45:39 AM »
Usirius, do you know which one of all those 899-cultivars you have. They are very differnt. I have 4 of them, but non has fruits resembling Poncirus. All fruits are smooth and shiny.

Cold Hardy Citrus / Re: Hardy citrus growing in Switzerland
« on: September 19, 2019, 08:47:23 AM »
Usirius, did you dare tasting the fruit last year?

Cold Hardy Citrus / Re: Japan acid citruses
« on: September 19, 2019, 08:44:00 AM »
Ilya, you said Keraji ist growing slowly, but mine, high crafted on Poncirus, are the fastest growing plants of all my citri.
I am talking about the in-ground plants in the green house. It is their second year and they have a dense crown of 60cm. Of cause they have been cropped for  round shape. There are four of them -all the same.

Huyen Linh Ho wrote:

"I believe that all of papeda hybrid will lose their perfect ratio of leaf winged petiole and leaflet. The special character of papeda family was its distinct leaf shape. For example, yuzu has a much smaller leaf petiole comparing to ichang papeda."

as Ilya has made clear Yuzu -referring to DNA analysis- is no hybrid of ichang papeda. It seems to be a cross of some (probably lost) ichangensis-relative and sour mandarin.

Cold Hardy Citrus / Re: Japan acid citruses
« on: September 16, 2019, 09:48:02 AM »
And we do have the right Keraji? Hope so!

Cold Hardy Citrus / Re: Japan acid citruses
« on: September 09, 2019, 11:17:03 AM »
Radoslav, do you own all these varieties of sour Japanese citrus? Could you please drop a word about taste?  :-*

Cold Hardy Citrus / Re: Some rare variety hardy seedlings
« on: August 31, 2019, 09:18:25 AM »
for me this story is a little bit confusing: citrus leaves that smell from cabbage to basil and mint? Are you in a sommelier-class and just practizing?

Cold Hardy Citrus / Re: Citrandarin 899J (Bernhard Voss)
« on: August 08, 2019, 07:49:02 AM »
Ilya, 899A is much worse. The question is: is there a chance to get better results if I craft on another rootstock? Slower growing or faster growing? I could use FD or some Citrumelo.

Cold Hardy Citrus / Re: Suspicious Plants
« on: August 08, 2019, 07:45:36 AM »
300 years of good practice.
For potting soil horse manure is composted for two years. And I suppose USA nurseries don't use composted Beech-foliage either. Old Europeans have been growing Citrus for at least 2000 years. But you Americans do everything better, know everythig better and you decide what's good taste and which is not. This sometimes is a little bit annoying.

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