I have loads of Cox mandarin hybrid 3798 seedlings. I want to test their frost tolerance, but I do not know, if it is worth to do, because I never saw nor eat its fruit.
So please, can someone describe taste or post picture of Cox mandarin hybrid 3798 fruit?

Cox is a Scarlet mandarin x P. trifoliata hybrid bred by NSW Agriculture and released commercially in 1995, so theoretically, it can tolerate some frost level.

Radoslav,
do you cultivate Citsuma "Prague"? It is said to be very hardy and to bear sweet Satsuma-like fruits.

I do not have this plant. This cross "unshiu x poncirus" was made on Czech University of Life Sciences Prague and Mr. Voss received it during his visit on this University. http://www.czu.cz/en/ .
He started to sell it under name "citsuma Prague".
As far as I know, it is only flowering so far in Mr. Cernoch collection and in some others collections which I know.
Here is picture of fruits from Voss web page:
http://www.agrumi-voss.de/satsxpon2.jpg
Very interesting cross, because of hardiness and taste is Trifeola (Mineola x Poncirus).
Here are some pictures of Trifeola fruit from Mr. Cernoch collection: http://www.citrusy.cz/forum/viewtopic.php?f=2&t=834&st=0&sk=t&sd=a&start=270

My Prague flowers every year but did not yet get fruits. Some years ago a trifoliate "sport" appeared on my Cit. P. It was very vigorous and had flowers similar to Poncirus. I gave Bernhard a twig of this strange thing: link
I have zwo Trifeola seedlings. They survived the last very cold winters but froze to the ground (without protection) But it was better than most Citsuma-Seedlings and much better than Citrumelo-seedlings.
Even slightly better was PoncirusXSunki-Mandarin seedling I got from Bernhard.
But I must admit that over all circumstances were not good for a fair frost test project. No sun protection (which is very important in cold and sunny winters) and the roots could not get deeper than 15cm into the soil. Mulch did not help much because bark mulch got soaked with water and was no good any more.
I now graft my scions on a 1m high poncirus-rootstock and protect against winter sun. But there was no winter untill now.

First strange thing - I see your comment only when I am logged out. when I am logged in - I see only empty field message.
Second - I just read your story about "strange thing" - interesting.
- I can try find more info about citsuma Prague history if you wish
and third - if you still have those strange branch - we can exchange budwood, if you agree.

It realy looks like one of parents is Flying dragon, also it looks like it is self sterile and needs pollen of parents - satsuma or poncirus to get fruit. I will ask someone who is in contact with University workers in Prag for more info.

Radoslav,

I would be grateful if you could find out more about Citsuma Prague. It seems to be the most promising hybrid for our climate.
And of course you can get budwood of my "strange thing". I would love to meet you if you come to Vienna. I suppose you sometimes visit Vienna Citrus-Exhibition (Wiener Zitrustage) which was an invention of myself 12 years ago. Bernhard is a permanent guest of this event.
I will send you my telephone number via e-mail

Ilya,

Citsuma "Prague" seems to be very hungry. You have to feed it very well. But you are right my C.P. has very few leaves but branches grow wll since I have started to fertilize more. Flowers are tiny and I cannot remember if there were even iny fruits. Maybe they dropped very soon.

Roberto,
It is planted in a very fertile soil and is not showing any sign of nutrient deficiency. But it is desperately slow. Do you have your plant in the pot or in the open ground?
Happy New Year,
Ilya

Joyeux Nouvel An!
Ilya, both (I have two of them) are potted. The one is grafted on 1m high Poncirus stem and it has grown a lot this year. I will plant it in the open ground this year.
/Roberto

Roberto,

Einen guten Rutsch ins neue Jahr!

Good luck in citsuma planting

Hallo Robert, Ivica and Radoslav,

regarding Citsuma Prag I can confirm some of your experiences. It is growing very strange and it partly looks like flying dragon with mighty thorns. But in generall I have the problem to get it growing. I only have a 5 years ols pottet exemplare, but it looks still poor. It carries only a view leafes and looses them suddenly. But on the other hand it is still having blossoms and fruits.

Below you can see to fotos I took last year.

This citrus is not yet planted outside. May be after the winter I will start a try...

Ciao

In some years Citsuma lost all its leaves in autumn. This year it kept all the leaves. Alas mine never kept its fruits. But I trust Bernhard: "Prague"-fruits taste like Satsuma (and nothing else) Right Andy?
Grüße nach Hamburg!
Robert

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