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Author Topic: Hardy citrus growing in Switzerland  (Read 1756 times)

SoCal2warm

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Hardy citrus growing in Switzerland
« on: January 21, 2019, 12:13:17 AM »
Triengen is Northwest of Lucerne, in Northern Switzerland

Thomasville Citrangequat on left, Keraji bushy one on right

They are both up against a wall, and it looks like they can be covered during the Winter.

closer view of Thomasville Citrangequat


Yuzu



Swingle Citrumelo in Schaffhausen, Northern Switzerland, North of Zurich

It was planted in the ground two and a half years before this picture was taken and had not been protected, relatively exposed. Suffered light leaf damage the second winter but recovered again very strong, but had not yet had flowers.


Ichang papeda in Erfstadt, just outside of Cologne, Germany (still zone 8a)



German language forum: http://www.exotenundpalmen.de/t1228f5-quot-winterharte-quot-essbare-citrus.html


(I don't think hardy citrus normally grows well in these areas, but can if it's in an ideal or protected spot)
« Last Edit: January 21, 2019, 01:39:54 AM by SoCal2warm »

maesy

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Re: Hardy citrus growing in Switzerland
« Reply #1 on: January 24, 2019, 05:58:24 AM »
Hahaha...I'm surprised seeing some of my citrus here!

The pictures are from 2017 and the plants have grown quit a bit since then. You are right, I cover the thomasville and the keraji in winter and also use a heating cable for very cold nights. The plants itself would not need any artifical heating, but I dont want to loose the fruits that are left on the trees.
I still grow more varieties of citrus. The hardiest that I dont protect are dunstan, hsr899a and rusk.

Marcel





Zitrusgaertner

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Re: Hardy citrus growing in Switzerland
« Reply #2 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?

maesy

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Re: Hardy citrus growing in Switzerland
« Reply #3 on: January 25, 2019, 10:20:43 AM »
It is a US852 seedling from Voss.
It flowered last year for the first time but no fruits yet. I dont expect the fruits to be very good, since the leaves still carry the strong poncirus flavor, but they are unifoliate.

Zitrusgaertner

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Re: Hardy citrus growing in Switzerland
« Reply #4 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.

maesy

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Re: Hardy citrus growing in Switzerland
« Reply #5 on: January 25, 2019, 07:12:53 PM »
But have you still harvested some fruits from your tree?
I would appreciate if you could post a picture for comparing.

Marcel

maesy

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Re: Hardy citrus growing in Switzerland
« Reply #6 on: January 26, 2019, 08:30:08 AM »
My 899a in may 2018.



maesy

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Re: Hardy citrus growing in Switzerland
« Reply #7 on: January 26, 2019, 08:45:00 AM »
My thomasville and keraji also in mai



usirius

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Re: Hardy citrus growing in Switzerland
« Reply #8 on: January 26, 2019, 04:06:01 PM »
My HRS899 which I also have got from Bernhard Voss produces fruits from time to time. Enclosed a Picture of a fruit of 2018. It is not edible.  I am sorry - don't know exactly what variety of HRS899 it is - I think it could be a "J" Who can help? This variety fo my opinion is nearly as hardy as Poncirus trifoliata.
 


« Last Edit: January 26, 2019, 04:09:20 PM by usirius »
„May your choices reflect your hopes, not your fears.“ N. Mandela

Ilya11

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Re: Hardy citrus growing in Switzerland
« Reply #9 on: January 26, 2019, 04:42:21 PM »
J is very different, it is entirely monofoliate
Best regards,
                       Ilya

usirius

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Re: Hardy citrus growing in Switzerland
« Reply #10 on: January 27, 2019, 02:34:52 PM »
Hey, Ilya, thank you for checking. I had planted also the varieties A, F and K for survival tests.. Only this one of the photo survive. So which of them (A, F, K) than it could be?
„May your choices reflect your hopes, not your fears.“ N. Mandela

Florian

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Re: Hardy citrus growing in Switzerland
« Reply #11 on: January 27, 2019, 04:43:22 PM »
I have a K which is also monofoliate. Btw. I thought they went from A to R not only K.

mikkel

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Re: Hardy citrus growing in Switzerland
« Reply #12 on: January 27, 2019, 05:49:45 PM »
899 A : Monofol., Blatt wie Mex.Limette, glattrandig, aber Mandarinen-Blattgeruch, sehr schöner  Wuchs, dekorativ, Jungsämling mit 10cm Größe hat `97/98 -8°C überlebt !
899 B : Mono.-trifoliat unregelmäßig, welliger Rand, gesägt, Jungsämling 97/98 genau so wie auch  E, G, K, L, M, und N erfroren - Abveredelungen waren schon vorher gemacht und werden  diesen Winter z.T. ein zweites Mal Frostgetestet.
899 C : Mono-trifoliat, sehr kleines (1x2cm), glattrandig abgerundetes Blatt
899 D : Trifoliat-monofoliat, leicht gezähnt, sehr schlanke Blätter, sehr buschig, wüchsig, hat          ebenso wie 899A und 899J ´97/98 als kleinster Jungsämling überlebt!
899 E : Monofol., schlank, wellig, breiter und dünner als J, sehr dornig (4-5cm lang!)
899 F : Mono,-bi-trifoliat, Blatt glattrandig, mittelgroß, dünn,
899 G : Mono- bis trifoliat, abgerundet, sehr kleine Nebenblätter,
899 H : Meistens trifoliat, etwas stärker geflügelt,etwas breiteres Blatt als K
899 J : Monofol.,sehr schlank,zäh-dick,spatelförmiges Bl.,aufrechter Wuchs.
899 K : Meistens trifoliat, mandarinenähnliche, glattrandig schlanke Bl.
899 L : Mono,-bi-trifoliat, schlankes Blatt, glattrandig
899 M : Blatt wie Hybrid 119 (Variabel, abgerundet, mono-trifoliat), groß(wie 119)
899 N : Monofoliat, kleineres, gerundetes Blatt
899 O : Trifoliat, sehr große Blätter, leichte Blattstielflügelung, wüchsig
899 P :Mono-bis trifoliat, gesägt
899 Q: Trifoliat, wüchsig, ähnlich "O".
899 R: Monofoliat gezähntes Blatt

mikkel

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Re: Hardy citrus growing in Switzerland
« Reply #13 on: January 27, 2019, 05:50:01 PM »
899 A: Monofol., Leaf like Mex.Limette, smooth-edged, but tangerine-leafy smell, very beautiful growth, decorative, 10 cm seedling has survived `97/98 -8 ° C!
899 B: Mono.-trifoliate irregular, wavy margin, sawn, seedling 97/98 as well as E, G, K, L, M, and N frostbitten - finishing was already done before and this winter will be partly released. a second time frost tested.
899 C: Mono-trifoliate, very small (1x2cm), smooth-edged rounded leaf
899 D: Trifoliate monofoliate, slightly serrated, very slender leaves, very bushy, vigorous, has survived as the smallest seedling as well as 899A and 899J '97 / 98!
899 E: Monofol., Slim, wavy, wider and thinner than J, very thorny (4-5cm long!)
899 F: Mono, bi-trifoliate, leaf smooth-edged, medium, thin,
899 G: mono- to trifoliate, rounded, very small stipules,
899 H: Mostly trifoliate, slightly more winged, slightly broader leaves than K
899 J: Monofilament, very slender, tough-thick, spatulate leaves, upright growth.
899 K: Mostly trifoliate, mandarin-like, smooth-edged slender leaves.
899 L: Mono, bi-trifolate, slender leaf, smooth-edged
899 M: leaf like Hybrid 119 (variable, rounded, mono-trifoliate), big (like 119)
899 N: monofoliate, smaller, rounded leaf
899 O: Trifoliate, very large leaves, light petioles, vigorous
899 P: Mono-to trifoliate, sawn
899 Q: trifoliate, vigorous, similar to "O".
899 R: monofoliate toothed leaf

mikkel

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Re: Hardy citrus growing in Switzerland
« Reply #14 on: January 27, 2019, 05:57:13 PM »
description from
https://web.archive.org/web/20120404023612/http://www.agrumi-voss.de/

first click on
"Die Citrusgärtnerei" to the left
then
 "Frosthärtere Citrus-und Poncirus-Hybriden,Jetzt mit neuen Züchtungen!"

then

M30 Sämlinge, 15 Selektionen!


there is no direct link

usirius

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Re: Hardy citrus growing in Switzerland
« Reply #15 on: January 28, 2019, 06:11:21 AM »
Thank you for the description of Bernhard Voss- I catched the direct link to this descritption: https://web.archive.org/web/20130106094639fw_/http://www.agrumi-voss.de/hrs.htm   
« Last Edit: January 29, 2019, 03:01:21 AM by usirius »
„May your choices reflect your hopes, not your fears.“ N. Mandela

mikkel

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Re: Hardy citrus growing in Switzerland
« Reply #16 on: January 28, 2019, 06:13:47 AM »
great!

Florian

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Re: Hardy citrus growing in Switzerland
« Reply #17 on: February 23, 2019, 06:37:04 AM »
If only all winters were like this one. Where I live, the absolute has been around -5/-6C.
My ichangensis x sinensis is not impressed 8).


SoCal2warm

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Re: Hardy citrus growing in Switzerland
« Reply #18 on: February 23, 2019, 06:57:17 AM »
My ichangensis x sinensis is not impressed 8).
Looks good.


I've done some temperature measurements and found that the temperature near a house is about 4 degrees F warmer (that's 2.2 degrees difference in Celsius) than it is further away in Winter.
No doubt being surrounded by other plants also helps.

Florian

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Re: Hardy citrus growing in Switzerland
« Reply #19 on: February 23, 2019, 10:17:45 AM »
Yes, the temperature near the house is warmer here too. But it is not enough in a cold winter with extended freezes. Last year, I lost a Citrange only about a metre away (in the pic on the right where you can see a few leaves of the changsha I put in its place, which btw. also survived unprotected).
« Last Edit: February 23, 2019, 10:20:34 AM by Florian »

maesy

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Re: Hardy citrus growing in Switzerland
« Reply #20 on: February 23, 2019, 11:58:40 AM »


My thomasville and keraji in perfect condition. I have picked some fruits of the keraji for fresh consumption nearly everyday for the last two weeks since I took off the cover. And there are still some left.
The maximum low inside was only -1.5°C, outside was maybe 5°C colder. No artificial heat.

The thomasville fruits are very jucy as always, but I want to leave them on the tree to get the full sweetness.
They are very decorative as well.

Zitrusgaertner

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Re: Hardy citrus growing in Switzerland
« Reply #21 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-

maesy

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Re: Hardy citrus growing in Switzerland
« Reply #22 on: February 24, 2019, 03:11:41 PM »
Oh, that is interesting and exciting.
Zitrusgaertner, does my 899a look like yours?

I hope to get some fruits this year after it bloomed the first time in 2018.

usirius

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Re: Hardy citrus growing in Switzerland
« Reply #23 on: September 17, 2019, 12:39:50 PM »
Enclosed some actual picturesof my HRS 899 bearing fruits. I pollinated some flowers with the New Zealand Citrus Variety  "Lemonade " - which bears great, citron-like,  sweet tasty, aromatic and juicy fruis. I will see what happened!

Now to the Pictures::











[





According to mikkels posting dated 27 Jan 2019 my complete trifoliate HRS899 - showing tall winged trifoliate leafes could be an "HRS899 O" or an "HRS899 Q":

899 A: Monofol., Leaf like Mex.Limette, smooth-edged, but tangerine-leafy smell, very beautiful growth, decorative, 10 cm seedling has survived `97/98 -8 ° C!
899 B: Mono.-trifoliate irregular, wavy margin, sawn, seedling 97/98 as well as E, G, K, L, M, and N frostbitten - finishing was already done before and this winter will be partly released. a second time frost tested.
899 C: Mono-trifoliate, very small (1x2cm), smooth-edged rounded leaf
899 D: Trifoliate monofoliate, slightly serrated, very slender leaves, very bushy, vigorous, has survived as the smallest seedling as well as 899A and 899J '97 / 98!
899 E: Monofol., Slim, wavy, wider and thinner than J, very thorny (4-5cm long!)
899 F: Mono, bi-trifoliate, leaf smooth-edged, medium, thin,
899 G: mono- to trifoliate, rounded, very small stipules,
899 H: Mostly trifoliate, slightly more winged, slightly broader leaves than K
899 J: Monofilament, very slender, tough-thick, spatulate leaves, upright growth.
899 K: Mostly trifoliate, mandarin-like, smooth-edged slender leaves.
899 L: Mono, bi-trifolate, slender leaf, smooth-edged
899 M: leaf like Hybrid 119 (variable, rounded, mono-trifoliate), big (like 119)
899 N: monofoliate, smaller, rounded leaf
899 O: Trifoliate, very large leaves, light petioles, vigorous
899 P: Mono-to trifoliate, sawn
899 Q: trifoliate, vigorous, similar to "O".
899 R: monofoliate toothed leaf

This year fruits are only round and hairy, not large, rather like fruits of poncirus trifoliata. he tyear before I had only one fruit which has been shaped like a small pear. Seem thet fruit shape can differ sometimes.

Does anybody have an "HRS899 O" or an "HRS899"Q" in his collection and help me in Determination my HRS899 plant?

Thanks.
« Last Edit: September 17, 2019, 12:46:30 PM by usirius »
„May your choices reflect your hopes, not your fears.“ N. Mandela

Millet

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Re: Hardy citrus growing in Switzerland
« Reply #24 on: September 17, 2019, 09:39:39 PM »
For a mature tree (it is flowering & fruiting)  it sure sure has a lot of thorns.

 

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