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Messages - Florian

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Cold Hardy Citrus / Re: Yuzu Ichang Papeda cross
« on: May 07, 2021, 04:47:23 PM »
my experience with C.ichangensis is very difficult to interpret ... But up to now I have not seen any photos of mature pure ichangensis that survived long term in the Northern part of Europe.
Just to point out, there is one picture of a C. ichangensis in Germany zone 8a here:
"Hardy citrus growing in Switzerland"

But it does seem to be in the middle of a residential suburban neighborhood, which may be having an effect on temperatures.

I know the guy and it is a seed-grown plant. It is by far the best ichangensis I have ever tasted (he sent me some fruit last year). They are early-ripening, seedless and easy to peel. Also, he says the plant is very coldhardy.

Cold Hardy Citrus / Re: Yuzu Ichang Papeda cross
« on: May 06, 2021, 02:02:20 AM »
My seedlings from ichang papeda fruits have not proven to be as hardy as trifoliate hybrids. I thought that it was supposed to be hardy to 0 degrees according to Tom McClendon’s Hardy Citrus for the Southeast book. I had a really warm winter this year with temps getting above freezing every day and I lost two more three year old seedlings and one suffered minor damage with only being protected by plastic sheeting cover a few nights this winter. I’m done trying to grow papeda here. I have one yuzu but it will be protected like a satsuma here when I plant it in ground. I lost a seedling yuzu years ago when I tried protecting with only frost cloth.

Funny you should say that. I know several people in Germany and Austria who say that their seedlings are more coldhardy than their plants that are grafted on Poncirus (and also hardier than Poncirus hybrids). I guess it depends on so many factors..

Cold Hardy Citrus / Re: Citrus ichangensis x sinensis (194)
« on: February 21, 2021, 05:43:55 AM »
From February 10 to February 14/15 we had a cold spell with daytime highs at around -3 C and nighttime temperatures between -5 and -9 C. The top layer of the ground was frozen solid. It has become once more apparent that this plant is not extremely coldhardy, at least not the leaves. The wood looks ok so far, I can see no cracks or fissures, but we won't know for sure until well into April/May.

I left the fruit on the tree right up to the cold spell to ascertain the impact on the fruit quality. Well, the fruit are quite dry and bitter at this time. The bitterness is unlike that of a grapefruit and not as pronounced. They taste sweet at first but then there is a cleary noticeable bitter aftertaste. I believe the best time to pick them where I live is around Christmas.

Cold Hardy Citrus / Re: Ichang papeda fruiting season?
« on: November 22, 2020, 10:05:17 AM »
Mine flower in spring and occasionally flower again later in the year. Depending on the variety, they can be ripe as early as October.

Cold Hardy Citrus / Re: Ichang papeda tasting / flavor
« on: October 19, 2020, 11:50:33 AM »
I'm thinking maybe in this northern climate, Ichang papeda fruits do not have time to grow to full size. The region around Portland/Olympia has already entered into the colder rainy season.
Keep in mind the early Fall season here has cooler/colder average temperatures than New England (although the temperatures show more stability with fewer very cold days).
If the fruits have only reached this size by this time in the year, then it is difficult to imagine them being able to grow any bigger.
This is from a big tree that should be fully mature enough.

I do not think it is the northern climate. My climate is cooler than Portland and has significantly fewer average hours of sun per day, yet the fruits grow to normal size and have no problem reaching maturity.

Cold Hardy Citrus / Re: Poncirus winter protection
« on: September 05, 2020, 04:14:44 AM »
Poncirus is reputed to withstand -20 to -25C, depending on the source. I have not been able to test this but there are other people here who have seen those kind of temperatures. I would think that light protection during the first few years should suffice and no heating is necessary but others may know more.

Would like to ask regarding the precocious, how long will take to fruit from seed?
Also would be interested what is minimum temp. it can withstand and what is best temp. to overwinter (could be overwinter in room temp. around 20C)?

I would also like to know what minimum temperatures they can take for a longer period of time. So far, I have been reluctant to buy a finger lime because I fear I will kill it in its first winter anyway. I overwinter my potted Citrus in a cold but just frost-free greenhouse.

They got a little protection over the winter.

New Zealand lemonade protected on all sides with 4 layers of glass with the north wall my house.

Fukushu kumquat seed grown with 4 layers of glass east and west.  3 layers for south wall

Valentine pomelo behind 4 layers of glass east and west. 3 layer south wall

Meiwa kumquat with 4 layers of glass with no heating devices

Impressive setup you have there. I would be much too lazy to build such a sophisticated protection every winter. Here's hoping winters contiue being as mild as they have been the last few years here.

Cold Hardy Citrus / Re: Ichangensis froze to death, then bloomed.
« on: June 16, 2020, 07:46:10 AM »
 19F/-7C seems weak. Any true Citrus ichangensis should be able to take more. I think Ilya said that Citrus ichangensis breaks dormancy quickly and is subsequently more vulnerable to (late) frosts and can be easily damaged at much higher temps than normal. I have never had this with my Citrus ichangensis but it is grafted on Poncirus. There is a fella near Cologne (GER) who has a seed-grown, fruiting tree which he claims is very coldhardy (also, the fruit are rather large and nearly seedless).

Cold Hardy Citrus / Re: Citrus in the Pacific Northwest
« on: May 29, 2020, 04:46:21 AM »
Do any of the coldhardy citrus reliably ripen for you? Where I live, the absolute low isn't even that much of a problem but many varieties are just too late and then frost can take the fruit.

Cold Hardy Citrus / Re: Hardy citrus growing in Switzerland
« on: May 27, 2020, 11:33:32 AM »
Last week, I planted this Citrumelo Nr. 82, that I grafted myself, in my grandma's garden. My own garden is very small and she let me use this corner :). Citrumelo 82 is a selection made by Eisenhut nursery here in Switzerland for those who don't know this cultivar. Pics and description can be seen here:

Cold Hardy Citrus / Re: Citsuma Prague
« on: May 05, 2020, 03:44:11 PM »
My in-ground Prague sailed through its first winter unscathed. It was a very mild winter with a low of around only -5 C. It has flowered for the first time but not set fruit (which is not surprising).

Cold Hardy Citrus / Reddish new shoots on Citrus ichangensis IVIA
« on: April 17, 2020, 01:39:29 AM »
I just wanted to show you this photo. I always enjoy it very much when my ichangensis produce new growth.

Congrats! I always feel it is more special when a seed-grown plant flowers.

Citrus General Discussion / Re: Shiikuwasha
« on: March 30, 2020, 02:58:27 PM »
Yuzu x keraji certainly does sound promising. :)

Cold Hardy Citrus / Re: Razzlequat
« on: March 24, 2020, 06:16:33 AM »
"Tart but good, much like a lime and with no unpleasant aftertaste at all" doesn't sound all that useless to me ;)

Citrus General Discussion / Re: New citrus variety: Banzzai
« on: February 07, 2020, 04:29:37 AM »
Thanks for the link. I don't like the many names either but at least it is becoming available in Europe.

I got grapefruit as well ;D. Do they say anything about hardiness or taste?

Cold Hardy Citrus / Re: ichangensis x Satsuma ?
« on: February 04, 2020, 07:30:26 AM »
This could be an interesting cross and probably pretty coldhardy but as far as fruit quality goes just get the right Yuzu, which is excellent.

Citrus General Discussion / Re: Shiikuwasha
« on: February 03, 2020, 03:40:24 AM »
Very interesting. I didn't think it would be that coldhardy. Might have to get one after all.. :)

Seems to be only monofoliate now, right?

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: January 24, 2020, 08:43:56 AM »
Exciting nonetheless. Keep up the good work!

Cold Hardy Citrus / Re: How to tell a fruit is frost damaged
« on: January 23, 2020, 07:22:31 AM »
Quick update. The fruit is actually good to eat when the rind is still greenish so I picked two today.

For comparison a large(ish) navel orange. Are these spots frost damage?

Cold Hardy Citrus / Re: How to tell a fruit is frost damaged
« on: January 22, 2020, 03:43:07 PM »
Thanks all for your answers.
Jloup, it is excellent, just like an orange.
Its coldhardiness remains to be tested in my climate. It has no problem with short cold spells down to -8/-10C (it has not been colder since I planted it) but it froze half to death after several days of continuous freezing temps in 16/17 where the absolute minimum temp wasn't even that low. This is the first time it has fruited after the damage.

Cold Hardy Citrus / How to tell a fruit is frost damaged
« on: January 21, 2020, 02:09:03 PM »
I still have some fruit on my ichangensis x sinensis. We are expected to see -4/-5C the coming nights.
They have already seen a few -2/-3C and still look pristine.
Will they wrinkle or fall off or something like that when damaged by frost?

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