Post by jibro on Feb 3, 2024 6:19:55 GMT -5
I found this French nursery with some cold hardy citrus hybrids unknown to me, unfortunately they don't send plants...
At least it's interesting to see what can come from different crosses and they also provide their own cold hardiness data...
AI Deepl translation from French
Eremomandarin n°2 – hybrid satsuma-eremocitrus
Eremomandarin n°2 is a cross between Eremocitrus glauca and the satsuma mandarin "Ikeda". It was bred by Sokolov in 2001.
The tree is very vigorous and upright, with fine, rounded leaves. The wood is fine and highly branched. This hybrid blooms fairly quickly, unlike other eremos. The fruit is a small, thin-skinned mandarin with blistered orange flesh (like caviar lemons). It can be eaten like a tangerine. The fruit ripens in November, well before the frosts.
COLD RESISTANCE :
This variety has withstood -14°C without any damage and can potentially withstand much higher temperatures. Excellent wind resistance.
The tree is very vigorous and upright, with fine, rounded leaves. The wood is fine and highly branched. This hybrid blooms fairly quickly, unlike other eremos. The fruit is a small, thin-skinned mandarin with blistered orange flesh (like caviar lemons). It can be eaten like a tangerine. The fruit ripens in November, well before the frosts.
COLD RESISTANCE :
This variety has withstood -14°C without any damage and can potentially withstand much higher temperatures. Excellent wind resistance.
Yuzumelo (Yuzu x Citrumelo)
Very vigorous, this extremely hardy hybrid is a good substitute for lemons in cold climates: the fruit is large to very large, quite juicy, fragrant and contains few seeds.
There's no bitterness in the juice, and no trace of poncirine. The rind has a lemony fragrance, but is of little interest. Fruit set is relatively slow (3-4 years), and the leaves are mostly trifoliate, with an attractive winged petiole. The fruit ripens in December, but is already usable from mid-October.
COLD HARDINESS :
Yuzumelo can withstand temperatures as low as -14°C without damage, and probably even higher. It has excellent dormancy, which is an advantage in cold climates with late frosts.
There's no bitterness in the juice, and no trace of poncirine. The rind has a lemony fragrance, but is of little interest. Fruit set is relatively slow (3-4 years), and the leaves are mostly trifoliate, with an attractive winged petiole. The fruit ripens in December, but is already usable from mid-October.
COLD HARDINESS :
Yuzumelo can withstand temperatures as low as -14°C without damage, and probably even higher. It has excellent dormancy, which is an advantage in cold climates with late frosts.
Citrumelo 5* x obovoidea
5* x Obovoïdea is a hybrid born in our nursery, between a Citrumelo 5* and Citrus obovoïdea "Bloomsweet". It bore its first fruit in 2018, 10 years after sowing.
The tree is vigorous and floriferous, quickly adopting a weeping habit. Its foliage is monofoliate, bifoliate and trifoliate. The foliage is particularly dark and shiny, which is what attracted us when the seed germinated!
The fruits are fairly large, ribbed and yellow when ripe. They ripen in November and are juicy, tart but edible raw. There is no poncirine aftertaste. The zest is slightly bitter and not very fragrant.
COLD HARDINESS:
It withstood a brief -14°C, and 5 days without thaw in 2012. It is not particularly sensitive to wind.
The tree is vigorous and floriferous, quickly adopting a weeping habit. Its foliage is monofoliate, bifoliate and trifoliate. The foliage is particularly dark and shiny, which is what attracted us when the seed germinated!
The fruits are fairly large, ribbed and yellow when ripe. They ripen in November and are juicy, tart but edible raw. There is no poncirine aftertaste. The zest is slightly bitter and not very fragrant.
COLD HARDINESS:
It withstood a brief -14°C, and 5 days without thaw in 2012. It is not particularly sensitive to wind.
Troyer x Rangpur
This hybrid between the Troyer citrange and the rangpur lime is a fairly hardy citrus fruit. The fruit is juicy, quite sweet, well-flavored and pear-shaped. When fully ripe, it can be eaten like a small, very fragrant, tangy mandarin orange. The shrub is compact and extremely productive from an early age. Young shoots and flower buds are purple. Ripens in late November.
COLD HARDINESS :
Troyer x Rangpur can withstand temperatures as low as -8°C without damage in our nursery. It does not like the wind, which blows away its young leaves and flower buds. Despite this, it is a very easy and adaptable citrus fruit to grow.
COLD HARDINESS :
Troyer x Rangpur can withstand temperatures as low as -8°C without damage in our nursery. It does not like the wind, which blows away its young leaves and flower buds. Despite this, it is a very easy and adaptable citrus fruit to grow.
Tested cold hardiness in Pépinière Tiny Mandragore
Keraji D14 - Our plant endured -12°C without any damage, and -14°C with reduced fruiting the following year. Protection from cold winds is recommended.
Changsha - Our plant withstood -12°C, and fruited normally the following year. However, protection from cold winds is advisable.
Slava Micurina - In the nursery, is proving to be very solid. It has withstood -10°C, sheltered from cold winds.
Xie shan - Among satsumas, this is one of the strongest. Our plant withstood -12°C without too much damage, and fruiting was only slightly reduced the following year. Protection from cold winds is essential, however.
US 119 - Up to -10°C in places sheltered from icy winds. It is often given as more hardy, but we observe significant damage below -10°C. The fruit is resistant to -6°C.
Bloomsweet - Our Bloomsweet withstood -12°C without too much damage, but with reduced fruiting the following year. Protection from cold winds is essential.
Bloomsweet - Our Bloomsweet withstood -12°C without too much damage, but with reduced fruiting the following year. Protection from cold winds is essential.
Thomasvile - It's a hardy citrus that can withstand -12°C and probably a little higher. Fruits are damaged from -4°C. Protection from cold winds is recommended.
Eremorange- At the nursery, we were unable to test Eremorange's hardiness limit. It withstood -14°C and 5 days without defrosting. Even cold winds don't scare it.
Citrangeremo- Against all expectations, it is less hardy than eremorange. However, it can easily withstand temperatures as low as -12°C and is not particularly sensitive to cool winds.
Ichang papeda Ivia - This is one of the strongest citrus fruits. Our plant was subjected to -14°C and 5 days without defrosting, so we think it can withstand -15 to -16°C.
Yuzu n°4 and Yuzu n°3 - Our plants withstood a brief -14°C without any damage, with 5 days without thawing. It can probably withstand -15/-16°C.
