Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.

Messages - tedburn

Pages: [1] 2 3 ... 17
Cold Hardy Citrus / Re: N1triVoss
« on: June 19, 2024, 01:49:23 PM »
That was my experience, the hardiness was largely compromised  by the presence of soft new growth as well as fruits hanging on the tree.

Thanks Ilya , I will try this late summer   :o

Cold Hardy Citrus / Re: N1triVoss
« on: June 18, 2024, 05:29:12 PM »
It could be something connected with late summer growth.
As a rule I remove all new growth appearing after the middle of August. As you know I am hundreds kilometers North to you , this winter had -9.6C for several nights and 10 days without soil defreze. Some damage to Yuzus, but not even leaves loss on N1tri.

Hello Ilya,
this is an interesting point. Ialready heard this, but I thought this would only influence the small summer groth twigs, but if I understand you right the summer groth will also influence the hardiness of the whole plant including the bigger older branches ? Is this your experience or is there also an explanation for this effect ?
I lost last winter a big part of my Satsuma Collot at -8,5C within the protection fleece.
In late summer I didn't cut late summer groth.

Satsuma Collot, first two fruits in December 2023,
about 1,3m high died back this winter about 10  cm
over the graft union, after 3 or 4 freeze days with a low of about - 8,5 C
unter protection fleece.
Fortunately there it stopped and regrows now.
Think I will graft one scion on Poncirus to try getting perhaps a little
bit more frost hardiness than on the current Swingle rootstock.

Flowers and fruitlets of some inground Citrus

Keraji, meanwhile a plant of 2m height

Sanford Curafora a flower booster

Ichangstar 60

Yuzu x Citrumelo

Yes I also heard about late fruit ripening. No I hope for at least one fruit to
see how it will ripe and taste. I will keep you updated.
In foresight I pollinated with Bloomsweet. Bloomsweet is among my citrus
a good pollen donor.
Good success with your Budwood  :).

3 weeks later the nice flower setting is there.

Clemyuz 22



Ichangstar 60

Cold Hardy Citrus / Re: Cold Hardy Citrus Experiment Zone7A NJ
« on: May 16, 2024, 02:28:19 AM »
Very nice to see, how the experiment turns to success.
Is the xie shan also in ground ? If yes astonishing that it took 7 F.

Inground Citrus with first flowers this spring,
though we had 3 nights of late freezes last week with -2 and -3 C

Bloomsweet 2. year on Flying Dragon

Ichangstar 60, graft of 2021, one year in ground

Trifeola, after one year in ground

Clemyuz 22, 2.year in ground

What is trifolis?

Trifolis is a Citrumelovariety which is said to have better fruit and
and a very good coldhardiness.

Citrangequat 10-3-4 is as far as I know not available in Europe, at least not under
that name.
We have this, perhaps similar variety:

In 2023 a lot of new varieties have been grafted or planted in ground.
Two of them are interesting concerning frosthardiness and
better fruit quality ( hopefully   ;)).

Ichangstar60, grafted in 2021, planted in ground 2023,
no winter damage and now flowerbuds

Trifolis, grafted in 2023 on inground Poncirus,
young graft with no damage in winter and
and now starting to grow


Here the positive surprises of my varieties which managed
the winter very good, conditions this winter I already
described in the previous posts.
Dimicelli  grafted in 2023, very thin graft survived and brings new groth

Staraji55, second winter with new groth, no damage at all

Nippon Orangequat first winter, shows new groth

Satsuma Silverhill,right, and Clemyuz 22 small graft left, both grafts of
2023 on Sanford Curafora no damage at all and with new groth

Yes, that' s an interesting report from Ilya and very informative.
But winterhardiness is often very different due to multiple
influences as rootstock, plant age, dormancy,location,....
In the first pictures you see left Bloomsweet with no damage and right
Slava Micurina with some leave damage of small twigs, otherwise
Slava is also O.K.
Good example for influence of only different locations and Rootstock of the same variety in
picture 2 and 3.
Picture 2 Dunstan with late morning sun - very healthy. Rootstock Flying Dragon
Picture3 Dunstan with early morning sun - some spolled twigs. Rootstock Poncirus

Hello Bussone and Nemaja.
@ Nemaja, thanks for the explanation.
@ Bussone, yes Slava micurina was reported to be cold tolerant more than
-10 degrees C , but as seen in my picture, at the same location im my gardean
nearby planted Bloomsweet and Duncan Grapefruit show no freeze
damage, while slava shows. So I guess slav is not much more hardy
than already pretty hardy Navel oranges.

Here all the 1 year old seedlings which have seen several freeze days and -8 C ,
(pictures of Chandler x Bloomsweet I already posted here) now winter damages shows
from dead/heavy damage (N1 tri Voss) to nearly no damage (Citrumelo N82).
Chandler x Bloomsweet now also shows more damage, but slso some still look quite good
as a positive surprise.
Also very interesting how different the frost hardiness within
one variety.
Because the stickers can' t be red, here the varieties
from left (worst) to right (best):
N1 tri Voss, 5* Citrumelo, Yuzu, Chandler x Bloomsweet, Citrumelo N82

Interesting trys you are starting, will be interesting to see the developments in the future.
Very interesting that more and more citrusfriends are engaging in trying to make
crossings with the goal of coldhardiness and edible fruits  :D.
Hope that we all have enough patience to cultivate them to bloom and then get
rewarded with success.
Keep on and Good luck  ;)

A few weeks of mild temperatures after the freezedays
 in January down to - 10 C most of the inground citrus
took the freeze very good. My worst/ weakest are:

Slave micurina in the back on the right side.

The others are pretty good.
Left in back Bloomsweet, in front of it Duncan Grapefruit and
in front left Nippon Orangequat.

The weakest of my inground citrus is Ichangensis x sinensis.
even a bark crack see in 2. picture

Cold Hardy Citrus / Re: F2 Citrandarin (X-639) winter hardiness trial
« on: February 21, 2024, 12:17:10 AM »
Kumin that s an interesting issue. Is it still enough to seperate the seedlings after a year ?
Or is already root weakness concerning hardiness set if they are the first year together in a pot ?
Because up to now I raise a lot in the same pot the first year and then after about one year
I separate the seedlings.
What is your opinion ?

I also discocered one such bifoliate seedling in a pot of one year old
Valentine pomelo seedlings in the greenhouse.
In spring I will plant them and the Chandler x Bloomsweet in
open ground and see the next winter ( with good passive protection
what will happen.6

First freeze test this winter with about -8 C outside in pots under fleece,
one year old seedlings of a cross Chandler pomelo x Bloomsweet grapefruit.
Some look bad but some  look very good and seem to have  a
quite good cold resistance.

Cold Hardy Citrus / Re: Table of citrus cold hardiness and %zygotic seed
« on: February 11, 2024, 02:33:00 PM »
Till, this could be an interesting cross concerning cold hardiness,
but concerning eatly fruit maturing it s perhaps a more late maturing cross ?
Did you already had staraji fruits ? How did they come out concerning
maturity time and fruit quality ?

Cold Hardy Citrus / Re: Poorman Orange/New Zealand Grapefruit
« on: February 08, 2024, 01:48:39 PM »
I have one, but overwintering in greenhouse.
I estimate coldhardiness between -7C and -10 C, but
problem is late fruit ripening.
I have first fruits, see pictures, but seems that maturity is late
I guess between April and May, first tested fruits end of January are
edible but still sour.
Chandler is at this time already much more sweet.

Today I opened the fleece protections of my inground citrus.
The next day s no freeze in sight, so hopefully the coldest time is behind us
Up to no no real harm to the citrus, some minor leaf damage and
some spoiled late sommer twigs.

HRS 899a looks fresh and good, last year first blooms - now 2024
 hopefully  also fruits

Chimera Prag leaves seem partially spoiled, twigs look good

Big surprise is last Sanford Curafora fruit, I left it for freeze test.
Seems to have a good cold hardiness, temperatures in fleece
have been Tmin - 7 or -8 C.

After more than 10 days freeze down to 14F or -10 C and now 3 days very mild weather I inspected my
inground Citrus.
The following 3 pictures show the current status.

1 year old seedling in pots have been in wintertest, only with fleece protection.
Surprising on right side of picture, Valentine - and Chandler x Bloomseet seedlings with nearly no visible damage.
While 5* citrumelo seedlings, on left side, have burnt tips.

Positive surprise,  Citrangerin, unprotected in first winter with no damage

Positive on left side Bigraft Bloomsweet and Staraji55 under fleeceprotection no damage, in 2. winter.
On right side Slava Micurina with burnt new twigs is deceiving concerning hardiness.

Now hoping that February don' t brings still harder freezes  ;)

 Seedlings generation 23/24,
all are frosthardy variants with the expectation to
find good seedlings/ plants with better
characteristics than the motherplants, concerning
frosthardiness and/or fruittaste.

All current seedlings, with the exception of clemenules, from own plants
some surely open pollinated while standing all together.
From 1 row to 2 row and left to right:
5* Citrumelo, Sanford Curafora, Kinga, Kinga
Clemenules, Kinga, YuzuxCitrumello x Bloomsweet
Kinga= Unknown parentage, very frosthardy and better fruits than Poncirus,
acidic, no poncirus aftertaste and very low bitternes

YuzuxCitrumello x Bloomsweet, show good development

Cold Hardy Citrus / Re: Tremendous Cold Wave coming our way
« on: January 14, 2024, 01:36:16 AM »
Hello Mike, I wish you the best, good useful protection
 and not such an extreme cold. Here in Germany we are already struggling
Since 6 days with freezy temperatures down to 14 F and daytime temperatures below
32 F  or only minimal above and the forecast shows still 7 days ongoing like that.
Let s see and hope the best. In every case for a few seedlings itbwill be a good
Cold hardy test  ;).

Pages: [1] 2 3 ... 17
SMF spam blocked by CleanTalk