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Messages - tedburn

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101
Cold Hardy Citrus / Re: Citrus damage after freeze
« on: January 05, 2023, 01:59:11 AM »
Quote from: hardyvermont on January 04, 2023, 10:06:27 PM
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.

102
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.

103
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 ?

104
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.

105
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.

106
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 ?

107
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.

108
Cold Hardy Citrus / Re: Citrus damage after freeze
« on: December 29, 2022, 02:48:32 PM »
Quote from: Perplexed on December 24, 2022, 09:11:47 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.

109
Cold Hardy Citrus / Re: Big freezes and variety selection
« on: December 27, 2022, 02:50:39 PM »
Galatians, thanks for your comments.
I think adequate watering is also important for further cold resistance.
I didn' t found an article to the survivor citrus cultivars of the big freezes, what was my intention, but I found an other as I think interesting article.
https://blogs.ifas.ufl.edu/washingtonco/2014/01/11/satsuma-protection-in-cold-weather-extremes/

110
Cold Hardy Citrus / Re: 4 year old Kumquats, finally done in(?) Not sure what to do
« on: December 27, 2022, 02:06:33 AM »
I also think, the trees will recover in spring summer. If no freezes anymore outside I would put them outside paybattention to the roots not watering to often and a feew days not too much sun.

111
Citrus General Discussion / Re: Christmas
« on: December 25, 2022, 10:00:15 AM »
Quote from: Millet on December 24, 2022, 09:05:08 PM
A very Merry Christmas to all.  Jesus is born.

Thank you Millet, true and important - merry Christmas

112
Cold Hardy Citrus / Re: Citrus damage after freeze
« on: December 25, 2022, 09:31:32 AM »
@vnomonee and perplaxed, very interested in your results, though some damages are not seen now but only in april/ may. We had freeze in winter 2020/21 down to 3,6 F and after freeze I thought plants to be still green and don' t hit by freeze, but then they died until april/may.
We had a few days freeze in December down to 8,6 F (unusual for december) but up to now only a few new branches a little bit hurt, nearly no damages.

113
Cold Hardy Citrus / Re: Big freezes and variety selection
« on: December 24, 2022, 06:09:38 PM »
Yes perhaps HLB can move north, but hope this will hopefully not happen, in zone 7 we still have a lot to do
to handle the winter freezes  ::).
So the intention of my post originally was to get more information about the freezes 1962 and what resulted from thesee, which deepest temperatures at which locations and which varieties survived ? Does anyone more about that, or has someone links to articles about the freeze and the survivors.


114
Cold Hardy Citrus / Re: Big freezes and variety selection
« on: December 24, 2022, 01:35:43 AM »
1rainman, thanks for your post, very interesting, how every location had it s own difficulties. We don't have HLB (and don' t get it hopefully) but we have in z7 sometimes hard freezes, so that in ground planted varieties have to be very hardy, and early fruit ripening as e.g. satsumas.
Up to now we only still know one single variety which has these abilities, the Chimäre Prag, a genetical mix of Poncirus and Satsuma. I have it in ground the 3. Winter but still no fruits yet, first flower this summer. But this variety is susceptible at my place to freeze and wintersun otherwise it gets bark cracks, needs protection.
What I didn' t know and didn ' t test in my place, that Pomelo is hardier than Grapefruit.

115
Cold Hardy Citrus / Big freezes and variety selection
« on: December 23, 2022, 04:39:51 AM »
Yesterday looking for more information to the big freeze 1962 and 1963 concerning the conditiond freeze time and freeze deepest temperatures and surviving varieties, but didn' t find useful information. Does anybody know sources with useful concrete datas ?
By the way I found interesting information to the freeze
1894  ;)
https://floridahistoryblog.com/the-great-freezes-1894-95-and-the-collapse-of-the-florida-orange-industry-7442e5d75337

116
Cold Hardy Citrus / Re: Frosthardiness experience with citrusvarieties in zone 7, down to 3,2 F
« on: December 20, 2022, 11:25:01 AM »
Quote from: kumin on December 20, 2022, 10:59:57 AM

[




A few F² Citranges survived -11,8 F ( -24,5 C) in January 2019.



Kumin, you did really a extraordinary breeding and selection, not sure if Poncirus is really much hardier. Only a pity, that frosthardiness and edibility are still in a big distance and will need a lot of further time and work. To my knowledge the only citrus with excellent  fruit when ripe and really frosthardy citrus is Thomasville Citrangequat with hardiness about - 15 ° C but still one problem is that fruit ripens in spring and will be spoilt in winter freeze under -5 ° C.

117
Cold Hardy Citrus / Re: Frosthardiness experience with citrusvarieties in zone 7, down to 3,2 F
« on: December 20, 2022, 11:14:43 AM »
Quote from: bussone on December 20, 2022, 10:30:51 AM
Quote from: tedburn on December 20, 2022, 05:49:21 AM
First cold spell (hopefully the only) this winter brought several frostdays down to - 8,6 °F / -12.9 ° C.

Quick fix:
-12.9 °C is +8.6 °F.

-8.6 °F would be -22.6 °C.

Poncirus can survive that, but you probably need a windbreak for it. With some luck, they've been found on the 5b/6a border.

Yes Bussone, your are fully right, temperature was +8,6 F, my head was perhaps already to early at the ° C

118
Cold Hardy Citrus / Re: Frosthardiness experience with citrusvarieties in zone 7, down to 3,2 F
« on: December 20, 2022, 05:49:21 AM »
First cold spell (hopefully the only) this winter brought several frostdays down to - 8,6 °F / -12.9 ° C.
Interesting how microclimate differs by different places and passive protection.

Here the coldest place
[/url]


Only 3 m distance but in protection of a short wall brings 2 ° C of higher temperature



the 2 year old seedlings, see last post, with backwall greenhouse and front protection airbubblefleece shows
a gain of about 4° C




last (warmest) place and double protection with fleece and air bubble fleece shows a gain of nearly 7 ° C of cold reduction.
On second picture are the protected plants, one and two year old graftings of slava micurina, Duncan grapefruit and Bloomsweet graft.




Conclusion, for shorter periods passive protecton can be very helpfull against frost damage, also protected places in the garden.



119
Citrus General Discussion / Re: Citrus Fruits - Ripe in SoCal December
« on: December 14, 2022, 05:23:36 PM »
Quote from: sc4001992 on December 14, 2022, 04:48:11 PM
"Digital taste comparison"

Do you mean what is the brix readings of all the different fruits?

No, this was only a joke. Due to the digitalisation progress in our society I thought as regarding digital pictures, it also would be nice if it would be possible to share the taste of the citrus varieties by gigital post.

120
Citrus General Discussion / Re: Citrus Fruits - Ripe in SoCal December
« on: December 14, 2022, 03:42:57 PM »
very nice harvest and excellent overview in comparing the different varieties by size.
Digital taste comparison would be nice  ;)

121
Citrus General Discussion / Re: Cocktailpomelo (Mandelo)
« on: December 14, 2022, 02:29:25 PM »
Quote from: tedburn on December 14, 2022, 02:28:03 PM
Quote from: poncirsguy on December 14, 2022, 11:57:53 AM
Very nice  Seeds are no problem for me either
Yes this is it, interesting that they confirm my  experience with early ripening and good for cooler climates
This year my fruit was already bigger than last years fruit, so I' m hopeful  ;D

122
Citrus General Discussion / Re: Cocktailpomelo (Mandelo)
« on: December 14, 2022, 02:28:03 PM »
Quote from: poncirsguy on December 14, 2022, 11:57:53 AM
Very nice  Seeds are no problem for me either
Yes this is it, interesting that they confirm my  experience with early ripening and good for cooler climates

123
Citrus General Discussion / Cocktailpomelo (Mandelo)
« on: December 14, 2022, 09:44:43 AM »
Today harvested and tasted my second fruit in the second year fruiting.
Due to my small plant I had every year only one fruit. The fruits are to delicious to skip it small, to let the plant faster grow  ;).
Cocktail pomelo is really one of the best citrus for me, especially in colder climates (Z7) it builds very tasty, sweet and juicy fruits with a delicious flavourmix of orange and grapfruit but without bitter- and sourness.
Only lots of seeds but thats for me no problem.
Other positive add on is the early ripening time.







124
Citrus General Discussion / Re: Tarocco Orange
« on: December 14, 2022, 09:31:44 AM »
very nice 👍 Ate my first Taroccos this year in spring in Italy.
For me Tarocco is the best Orange, so fine, tasty and juicy. Now I have 3 Tarocco plants in my collection, but still no fruits yet.

125
Cold Hardy Citrus / Re: Frosthardiness experience with citrusvarieties in zone 7, down to 3,2 F
« on: December 10, 2022, 12:00:25 PM »
Winter preparations ready, longer lasting freezes down to -11° C / 12 ° F  announced, will be good hardiness test for some in summer or last year planted citrus, while last winter was mild.

Dunstan has to proof hardiness without protection


Ichangensis IVIA takes her 3. winter, only light stem protection.

two year old seedlings of Meyer lemon, Ichangstar 60, Meyer lemon and a graft of Ichangquat on Poncirus have ti proove their cold hardiness with light protection.
Goal is not to kill the plants but to select the hardiest for further cultivation.

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