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Messages - tedburn

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Cold Hardy Citrus / Re: Citrus damage after freeze
« on: December 29, 2022, 02:48:32 PM »
Ill 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.

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.

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.

Citrus General Discussion / Re: Christmas
« on: December 25, 2022, 10:00:15 AM »
A very Merry Christmas to all.  Jesus is born.

Thank you Millet, true and important - merry Christmas

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.

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.

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 Chimre 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.

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  ;)



A few F 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.

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

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

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.

Citrus General Discussion / Re: Citrus Fruits - Ripe in SoCal December
« on: December 14, 2022, 05:23:36 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.

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  ;)

Citrus General Discussion / Re: Cocktailpomelo (Mandelo)
« on: December 14, 2022, 02:29:25 PM »
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

Citrus General Discussion / Re: Cocktailpomelo (Mandelo)
« on: December 14, 2022, 02:28:03 PM »
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

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.

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.

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.

Cold Hardy Citrus / Re: Meyer lemon
« on: December 03, 2022, 03:20:17 AM »
It helps.
I would say yes.
I planted 1 year old seedlings last summer in ground in front of my green house  and they survived -6C the last mild winter with not very much damage, this summer they have good grown further. So if they are a little bit older, I think -7 should be possible perhaps even without damage . Important is to brung them already in late spring in earth for good establishment until winter begins.

Hello Mikkel,
no sorry, there I made a wrong spell, this was an Ichangquat.
I have no Yuzuquat.

Cold Hardy Citrus / Re: Thomasville v. Morton?
« on: December 01, 2022, 03:50:54 AM »
I have Morton two years old, no fruits yet either. Can we see pictures of your plant? Is Thomasville worth it in zone 7a? I want a tree but will have to be in the ground. I don't think Morton can survive outside.

I have documented the development of my in ground planted citrus hybrids, also Morton and Thomasville in this post, there you can see pictures and how they managed two winters, the first very hard, the second more mildly. But Thomasville is one of my most hardy citrus varieties.

Cold Hardy Citrus / Re: Thomasville v. Morton?
« on: November 30, 2022, 04:16:12 PM »
Interesting Report Till,
I also have a Morton since 2,5 years in ground but no blooms/ fruits yet.
How old is  yours and is it in pot or open ground ?
Did you also try to leave your fruits for some weeks after harvesting, seems the fruit still
can loose some sournes ?

Some new candidates for winterhardiness test.
Depending on freeze depth and duration no or one or double layer frost cloth as protection in planning.
From left to right:
Meyer lemon seedlings, 1,5 years
ichangquat graft on PT, 1 year old
Ichangstar 60 seedlings in the middle
Star ruby seedlings, 1,5 year old on the right

Citrus General Discussion / Re: when to pick Chandler pummelo?
« on: November 22, 2022, 02:35:52 PM »
impressing fruit concerning size and colour.
How long did your fruit take from flower to harvest annd how old is your tree ?
Thanks and regards Frank

Citrus General Discussion / Re: when to pick Chandler pummelo?
« on: November 21, 2022, 11:41:17 AM »
@ Millet and Brian, yes I also thought or expected Chandler to get pink, but if taste is excellent this is more important  ;).
Perhaps the pink coloration comes only in the warmer climates than ours.
In every case I was very pleased to be able to harvest in the same year than blooming and before winter, didn ' expect that, though this year we had a hot and dry summer.

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