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Post by samyaza on Sept 25, 2012 8:04:19 GMT -5
The only North-adapted almond I read about is the American variety 'All in one', self-fertile and said to be more adapted to northern part of France where early-flowering Prunus are difficult because of frequent and hard last frosts.
Moreover, I once read on a French forum that variety did every year at a woman's in Alsace, and I personality remember almond trees ( almost sure, but don't know the variety ) planted along the road during a French-German scholar swap in Trier, Germany. I was 13 but it really surprised me, so brought as many fruits back home as possible, but none germinated the next spring.
'All in one' is sold grafted on a peach rootstock, but the most used in France nowadays is a peach x almond hybrid made by the French research institute INRA. Almond scions need a vigorous rootstock. An almond cultivar as rootstock is the best but it can't stand lime, nor moist soils because its tap root would asphyxiate. Grafting on peach is the second best choice and avoid such problems but life time is shorter. That's why Peach x almond is the best compromise outside the Mediterranean area.
If I had a chance to find a such variety, I think I'd graft it on a local, adapted and vigorous OP peach, as most of plum rootstocks are incompatible with almond scions, and I don't know where to find a peach x almond rootstock I could reproduce myself.
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Post by samyaza on Oct 9, 2012 12:58:03 GMT -5
Excuse me for my error : in fact almond trees LOVE lime. It just can't bear clay where it would asphyxiate. Its ideal is a poor, dry, deep, lime-rich ( > 20% ) soil.
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Post by steev on Oct 9, 2012 20:09:31 GMT -5
I think Hall's Hardy is a pretty cold-tolerant variety.
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Post by castanea on Oct 9, 2012 22:21:38 GMT -5
USDA GRIN has quite a few cold hardy/late blooming almond varieties, some from Russia, that are completely unknown to most American orchardists. I went through their orchard last year picking out seeds from cold hardy varieties and planted some in Missouri this spring. I haven't been back to see how they are doing.
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Post by 12540dumont on Oct 10, 2012 1:02:02 GMT -5
Castanea, I think you should have to put up one of those weather cams so we can all see how they are doing!
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Post by MikeH on Oct 10, 2012 9:55:15 GMT -5
USDA GRIN has quite a few cold hardy/late blooming almond varieties, some from Russia, that are completely unknown to most American orchardists. I went through their orchard last year picking out seeds from cold hardy varieties and planted some in Missouri this spring. I haven't been back to see how they are doing. Hmmm. I wonder if they have varieties planted out that they are not showing in their database. I could only find a couple from Russia and very few in total that were late blooming. Perhaps I'm looking in the wrong place. We are talking about Prunus dulcis, aren't we?
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Post by castanea on Oct 10, 2012 17:15:20 GMT -5
USDA GRIN has quite a few cold hardy/late blooming almond varieties, some from Russia, that are completely unknown to most American orchardists. I went through their orchard last year picking out seeds from cold hardy varieties and planted some in Missouri this spring. I haven't been back to see how they are doing. Hmmm. I wonder if they have varieties planted out that they are not showing in their database. I could only find a couple from Russia and very few in total that were late blooming. Perhaps I'm looking in the wrong place. We are talking about Prunus dulcis, aren't we? They are not all pure prunus dulcis, though most are. They have some European varieties (German in particular) that came from Russian origins, so there's more Russian influence than is immediately apparent. Late blooming is relative. Almost everything in this climate is early blooming because it can be early blooming. But quite a few of the early bloomers are blooming early in response to climate (heat) signals, not in response to day length. If they were in colder areas, they would be blooming later.
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Post by MikeH on Oct 10, 2012 19:47:08 GMT -5
Hmmm. I wonder if they have varieties planted out that they are not showing in their database. I could only find a couple from Russia and very few in total that were late blooming. Perhaps I'm looking in the wrong place. We are talking about Prunus dulcis, aren't we? They are not all pure prunus dulcis, though most are. They have some European varieties (German in particular) that came from Russian origins, so there's more Russian influence than is immediately apparent. Late blooming is relative. Almost everything in this climate is early blooming because it can be early blooming. But quite a few of the early bloomers are blooming early in response to climate (heat) signals, not in response to day length. If they were in colder areas, they would be blooming later. Do you by any chance have names/accession numbers? I've been sorting the file (attached) and poking around in it a bit. Based on latitude, some of the Chinese accessions with a 38N latitude have possibilities - www.ars-grin.gov/cgi-bin/npgs/html/tax_stat.pl?taxno=29890&country=China&unavail=&type=The latitude and altitude suggest cold hardiness. Isolating the sweet varieties - www.ars-grin.gov/cgi-bin/npgs/html/close.pl?266015+3. There are accessions on both lists. Some of the varieties are available as budwood. Attachments:
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Post by castanea on Oct 10, 2012 20:02:15 GMT -5
They are not all pure prunus dulcis, though most are. They have some European varieties (German in particular) that came from Russian origins, so there's more Russian influence than is immediately apparent. Late blooming is relative. Almost everything in this climate is early blooming because it can be early blooming. But quite a few of the early bloomers are blooming early in response to climate (heat) signals, not in response to day length. If they were in colder areas, they would be blooming later. Do you by any chance have names/accession numbers? I've been sorting the file (attached) and poking around in it a bit. Based on latitude, some of the Chinese accessions with a 38N latitude have possibilities - www.ars-grin.gov/cgi-bin/npgs/html/tax_stat.pl?taxno=29890&country=China&unavail=&type=The latitude and altitude suggest cold hardiness. Isolating the sweet varieties - www.ars-grin.gov/cgi-bin/npgs/html/close.pl?266015+3. There are accessions on both lists. Some of the varieties are available as budwood. I have an early version of the list in an email but I just tried to incorporate it here and it didn't format well. Send me a PM with an email address and I will forward the almond list to you. I also have an improved list that I revised by hand after speaking to the almond researcher who showed me around the USDA orchard. I'm not sure where that one is. If I can find it, I will scan it and email it also.
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Post by MikeH on Oct 10, 2012 20:06:45 GMT -5
email address is in my profile
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Post by steev on Oct 10, 2012 20:38:57 GMT -5
I'm interested in late-blooming hardy almonds, as I get very late frosts and very few, infrequent almonds. I think one, of six varieties, produced three this year.
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Post by castanea on Oct 11, 2012 9:26:08 GMT -5
email address is in my profile I sent it
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Post by Deleted on Nov 10, 2012 20:58:27 GMT -5
In my part of the country, around Thanksgiving and Christmas, it can be warm enough to wear shorts. We say it's time for a snow when the trees are in bloom.
This doesn't seem to be as harmful to our almonds as a weak southern exposure, in other words, not enough light.
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Post by cortona on Nov 12, 2012 13:35:59 GMT -5
ilex, are the spaish variety interessant? can you give me a link on were i can find it ?
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Post by ilex on Nov 14, 2012 2:51:55 GMT -5
ilex, are the spaish variety interessant? can you give me a link on were i can find it ? The best place to find things in Europe is www.fruitiers.net/As Spanish varieties there are many interesting ones. Finding them can be more or less easy. As almond trees, in my area we usually plant marcona, which is considered the best tasting. Should be easy to find.
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