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Messages - tedburn

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After my citrus  survived very good freezy February 2023,
March with nightfreezes and daysun stressed some
of my citrus more than I thought.

New Clemyuz22 graft on Poncirus and Citrumelo x Yuzu also now look very good

Ichangensis x sinensis looked very good, when I removed winter protection fleece end of February, now after a few weeks with nightfreezes and daysun it looks stressed, sun protection would have been necessary.

New grafts of Nippon Orangequat left and Keraji right on Sanford Curafora, looked also very healthy after removing of protection fleece. Now Nippon graft seems to be much damaged, Keraji only light damage.

Satsuma Collot, which is planted near Ichangensis  x Sinensis shows no damage of late night freezes.

Cold Hardy Citrus / Re: Citrus damage after freeze
« on: March 08, 2023, 12:21:51 AM »
I’m so discouraged after the hard December freeze, I am close to quitting citrus altogether. I lost or suffered severe damage to everything except poncirus. My power was out for two hours during a 2 degree freeze with a high of 8 degrees and below freezing for about five days. That means my heaters were off in cold frames and we couldn’t get generator to start to get heaters back on. Then, I figured out I had used too long of an extension cord to supply power to my heaters in the valley orchard, so basically those citrus got no power or heat all winter until after the week of hard freeze, so they’re all dead except the side of the yuzu that was literally touching the side of the big water barrel.

Total losses:
Rio Red grapefruit ( heaters too small)
Bergamot ( too damaged to keep but alive)
Shiranui ( valley- no power)
Sugar Belle ( valley-no power)
Ichang lemon ( valley-no power)
Citradia air layer ( covered only, no barrel)
Citradia on poncirus air layer unprotected
Citrumelo 80-5 unprotected
Thomasville unprotected
Dunstan unprotected
Benton unprotected

Alive but severely damaged by house and got power back after two hours without it:

Minimal leaf loss or tips of leaves damaged with power off two hours:
Seedless Changsha on flying dragon
Meiwa kumquat ( gets heat from French drain on south side of house)
Croxton grapefruit ( French drain south side of the house)
Saint Anne ( has two large barrels up against west side of tree)

My best survivors that didn’t have ground heat from French drain and only water barrels in a cold frame when heaters went out are Saint Anne and Changsha. My potted grafted-on-poncirus citrumelos and citradia trees were also undamaged.

Oh Ctradia,that s really hard, I' m sorry for you. But don ' t skip your citrus,  enjoy your survivors and perhaps invest in more hardier citrus as Prague and keep them on Poncirus.
And perhaps optimize still your passive protection with water barrels and fleece and perhaps places with not to early winter sun.
Enjoy the new sprouts of your survivors.
Regards Frank

Cold Hardy Citrus / Re: Citrus damage after freeze
« on: March 07, 2023, 06:14:46 PM »
thank you .
Thats also a point that freeze abd sun is extreme challenging and shade helps a lot to get minor damage.

A few days ago I liberated all my passive protected citrus from frost protection fleece.
All have been in propper shape, no damage.
Yesterday at a short inspection I noticed light stem cracks at my Dunstan.
When regarding my Wlan thermometer and I saw how fast temperature rises from -4°C to 6 ° C now I can still more understand how necessary sun protection in weather conditions with night frost and full daytime sun is.

Cold Hardy Citrus / Re: F2 citrange winter hardiness trial
« on: February 15, 2023, 01:21:33 AM »
Here are a few photos of seedlings of Meyer Lemon pollinated by Segentrange 026 pollen.

this could get an interesting hybrid at least for zone 7, I have two year old meyer seedlings in ground (first year) and one of three managed -8 ° C without damage, while two others seem to have damages.

Today made a check at my 5 graft Flying dragon. After a low of 8,6 F and passive protection also the new grafts of summer 2022, Clemyuz 2-2 ( ten degree tangerine),Bloomsweet and Poncirus #7 look very good with small green buds. Morton and 5* Citrumelo grafts of 2021 also look nice and healthy.
Also Ichanggqat, plant on the left side,
in ground since  spring 2022 looks good.

Cold Hardy Citrus / Re: Citrangequat(but Meiwa)
« on: January 30, 2023, 11:55:57 AM »
I did not realize that.  Marumi can survive 10F colder than ether Meiwa or Nagami.  why not that cross.

I always read that Marumi and Meiwa have about the same frosthardiness of about -12°C. Did you test the both in your ground comparable and recognized the differenze in frosthardiness ? I only have meiwa and fukushu, but not in ground yet.

Citrus General Discussion / Re: Honey Pomelo seedlings
« on: January 30, 2023, 06:58:42 AM »
Interesting, seems to have some Poncirus and probably coldhardy genes. Interesting how hardy and how the fruit quality is ?

Cold Hardy Citrus / Re: shiranui sumo citrus
« on: January 30, 2023, 12:14:53 AM »
Very interesting and beneficial Citradia, to know of such Cold hardiness, still on search for Shiranui for taste but very good ad on the cold hardiness also for my climate  8)

Citrus General Discussion / Re: Moro vs. Tarocco vs. Amoa 8 vs. Fragola
« on: January 21, 2023, 07:47:35 AM »
I can tell that Tarocco is the best orange for me, very tender flesh and very good balance of acid and sweetness, nearly none acid and very good taste.
For me far better than Navels. Amoa, I don' t know.

Citrus General Discussion / Re: Dekopon/Sumo/Shiranui
« on: January 20, 2023, 01:57:52 AM »
I am picking the majority of my crop now and they are really fantastic.  The ones from my tree are twice the size of the ones I see at the store, not sure why, but they are really great.  Easy peel, sweet, seedless, and the peeled fruit is larger than my fist!  Each segment is about equivalent to a clementine's flesh.

Thanks Brian, very encouraging, I' m still not a Dekopon cultivater, but after your report I will get one  8).

Cold Hardy Citrus / Re: Cold Hardy Citrus Experiment Zone7A NJ
« on: January 16, 2023, 12:21:46 AM »
Thanks Nick, very interesting. Means cooked dead or do you think they recover ? Do you have pictures of the changsha and Morton ?

Cold Hardy Citrus / Re: Citrumelo
« on: January 15, 2023, 06:44:07 AM »
Thank you.  Does anyone have any experience with Citrumelo plants that are not grafted or any "citrus hardy" plants that are not grafted

Mike Adams

I think there are some members which have experiences with coldhardy citrus, but to receive answers you should ask more detailed what you are interested in. I e.g. I have a Yuzu since 3 winters in ground, froze to earth in winter after a low of - 15° C and has now recovered again or a Dunstan citrumelo seedlings two year old in ground took -13° C this winter - all survived, some with slight damages, others with none, depending on genetics and microclimate of place.

Can anyone help me identify this fruit on the tree. It may be a grapefruit or pomelo.

the shape looks a lot like my valentine

I will not be able to tell what fruit yet, when it is ripe I should be able to taste it.
This fruit is interesting in that it has the pitam (tip) that I don't see in most fruits.

Cold Hardy Citrus / Re: Hamlin x Flying Dragon
« on: January 10, 2023, 05:31:22 PM »
Thanks Ilya, so glad that I have Morton in my garden - now it still has to bloom  ;)

Cold Hardy Citrus / Re: Hamlin x Flying Dragon
« on: January 10, 2023, 12:56:18 PM »
So, after a month in room the fruit is completely yellow.

No seeds, rather thick albedo, skin has lemony perfume and  lost most of poncirus like odor.

Fruit is easy to juice

Juice has "soar" smell, no poncirus aftertaste, 12° Brix, bitter acidic taste,  very faint barely perceptible internal oils.

Very interesting Ilya. Nice success.
How would you rank the taste within your frosthardy crosses and other frost hardy varieties of you including Morton ?

Cold Hardy Citrus / Re: Citrus damage after freeze
« on: January 05, 2023, 03:51:02 AM »
Hardyvermont, thank you. Good information. Also interesting that Sugarbelle ( tangelo minneola?) can take so deep cold, thought that she get killed earlier.
Mine are 2 and 3 winters now in ground and the biggest are Sanford Curafora and Keraji with about 1,5 m hight.

Cold Hardy Citrus / Re: Citrus damage after freeze
« on: January 05, 2023, 01:59:11 AM »
8 F, 13 C was not cold enough to differentiate a lot between most hardy citrus.  Both types of 10 Degree Tangerine appear to be more sensitive to the cold than expected, leaves curled more than most.  Brown Select, Changsha, Keraji appear to have done well.  Sugar Belle will probably lose its leaves, but seems to have survived.
Interesting information, we also went down to 8° F in December and also have nearly no or no damage, but most of my trees have been fleece protected except Ivia and HRS899. Did you have your trees unprotected and how old are they. Interesting especially for Keraji and ten degree - thanks.

Cold Hardy Citrus / Re: Citrus damage after freeze
« on: January 03, 2023, 02:04:18 PM »
thanks, very interesting. I planted some 2 year old seedlings of Star ruby Grapefruit in front of my Glasshouse and protected them with air bubble fleece. I had inside the protection -8° C while outside we had - 13° after a few days with freeze and the seedlings had nearly no damage, so I was astonished how much they can take - and corresponds to your results with your Rio Reds.

Cold Hardy Citrus / Re: Citrus damage after freeze
« on: January 03, 2023, 03:42:36 AM »
interesting post, big job 😉.
Could you also measure the deepest temperatures which the different citrus has to support, this would be interesting to judge the frosthardiness which the digferent cultivars did take. I understand that the 2° F have been outside and not in the tunnels ?

Cold Hardy Citrus / Re: Is this sun scald?
« on: January 02, 2023, 02:06:36 AM »
I also have these white spots on some of my coldhardy in garden planted citrus after -13 ° C. Especially on the twigs of late summer, which are not fully hardened. But I agree that in combination with wintersun the damage gets quickly worse.

Citrus General Discussion / Re: Dekopon/Sumo/Shiranui
« on: December 31, 2022, 04:46:43 AM »
don' t think if it s  so difficult to grow them in Europe/Germany, I know some growers which cultivate them successful. The plant shoulb be available at the well known citrus sellers in Italy or France.

Citrus General Discussion / Re: Citrus Fruits - Ripe in SoCal December
« on: December 30, 2022, 09:57:22 AM »
very nice fruits Kaz, saw that you also have Kaboshu, had the chance to buy it in a store this month, taste was not too bad but no comparison to sweet mandarins. I was main interested because if cold hardiness, but taste and cold hardiness (for my zone 7) are not satisfying for my opinion.
What are you using it for, while your other fruits are all delicious and sweet ?

Cold Hardy Citrus / Re: fortunella margarita - kumquat cold tolerance
« on: December 30, 2022, 07:47:49 AM »
I think this should be no problem. I had this year 2 year ild seedlings of Grapefruit star ruby which took -8 ° C without much damage and we had 2 or 3 days with freeze also at daytime. And Kumquat as I know is more cold hardy.

Cold Hardy Citrus / Re: Citrus damage after freeze
« on: December 29, 2022, 02:48:32 PM »
I’ll report on these on Monday, should be above freezing on Monday and should be straight.

It also would be interesting, how d the grafted plants are and how long they have been planted in ground - thanks

5* star citrumelo - Grafted
Dunstan citrumelo - own
Taitri - own
Ichang Papeda - Grafted
Dimicelli - Grafted
Ventura Lemandarin - own
Citrangremo -Grafted
F2 Cirus glauca/finger lime? - own
F2 Citrus australis - own
N1Tri x Citrus - own
Ichangstar60 x Citrus - own
Citrus hongheensis x Citrus - own
Razzlequat - own
Citrus taiwanica - own
Citrus glauca x shek - grafted
All grafted are on poncirus

I also have ornamental trees like Cinnamomum, and Persea I may report on.

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