The Tropical Fruit Forum

Cold Hardiness results, low of 9F. -13C:
Dead
Bloomsweet  High grafted and some poncirus growth allowed below.
Juanita
Brown Select
US 119

A lot of damage
Keraji, one larger tree dead.  Another will recover
Curafora
10 Degree 3-3

In better shape, minimal or no damage
10 Degree 2-2
CiClem 10
Ventura Lemondarin
Morton
Swingle
Bishop 852

Well My zone 7 experiment failed. Arctic Frost, Orange Frost, and Bumper all succumbed to this years winter. I thought they could male it unprotected but alas they are dead to the roots.

Oh  that s a pity, but I wouldn' t say failed, the first try failed  , there are still a lot of varieties worth for a try in zone 7, though not all have very good fruits. But I think Prag Citsuma, and Carolina lime from Stan Mc Kenzie nurseries should be very frosthardy  and have good fruits.
My Prag Citsuma survived very good 3 winters down to -16 ° C. The only protection was a frost cloth, espeacially for night frosts with day sun in spring.
Have good luck.

I’m so discouraged after the hard December freeze, I am close to quitting citrus altogether. I lost or suffered severe damage to everything except poncirus. My power was out for two hours during a 2 degree freeze with a high of 8 degrees and below freezing for about five days. That means my heaters were off in cold frames and we couldn’t get generator to start to get heaters back on. Then, I figured out I had used too long of an extension cord to supply power to my heaters in the valley orchard, so basically those citrus got no power or heat all winter until after the week of hard freeze, so they’re all dead except the side of the yuzu that was literally touching the side of the big water barrel.

Total losses:
Rio Red grapefruit ( heaters too small)
Seville
Bergamot ( too damaged to keep but alive)
Shiranui ( valley- no power)
Sugar Belle ( valley-no power)
Ichang lemon ( valley-no power)
Citradia air layer ( covered only, no barrel)
Citradia on poncirus air layer unprotected
Citrumelo 80-5 unprotected
Thomasville unprotected
Dunstan unprotected
Benton unprotected

Alive but severely damaged by house and got power back after two hours without it:
Owari
Kimbrough

Minimal leaf loss or tips of leaves damaged with power off two hours:
Seedless Changsha on flying dragon
Meiwa kumquat ( gets heat from French drain on south side of house)
Croxton grapefruit ( French drain south side of the house)
Saint Anne ( has two large barrels up against west side of tree)

My best survivors that didn’t have ground heat from French drain and only water barrels in a cold frame when heaters went out are Saint Anne and Changsha. My potted grafted-on-poncirus citrumelos and citradia trees were also undamaged.

Can anyone help me identify this fruit on the tree. It may be a grapefruit or pomelo.

the shape looks a lot like my valentine

I will not be able to tell what fruit yet, when it is ripe I should be able to taste it.
This fruit is interesting in that it has the pitam (tip) that I don't see in most fruits.

So, after a month in room the fruit is completely yellow.



No seeds, rather thick albedo, skin has lemony perfume and  lost most of poncirus like odor.



Fruit is easy to juice



Juice has "soar" smell, no poncirus aftertaste, 12° Brix, bitter acidic taste,  very faint barely perceptible internal oils.