The Tropical Fruit Forum

I did not realize that.  Marumi can survive 10F colder than ether Meiwa or Nagami.  why not that cross.

I always read that Marumi and Meiwa have about the same frosthardiness of about -12°C. Did you test the both in your ground comparable and recognized the differenze in frosthardiness ? I only have meiwa and fukushu, but not in ground yet.

Very interesting and beneficial Citradia, to know of such Cold hardiness, still on search for Shiranui for taste but very good ad on the cold hardiness also for my climate 

I am picking the majority of my crop now and they are really fantastic.  The ones from my tree are twice the size of the ones I see at the store, not sure why, but they are really great.  Easy peel, sweet, seedless, and the peeled fruit is larger than my fist!  Each segment is about equivalent to a clementine's flesh.

Thanks Brian, very encouraging, I' m still not a Dekopon cultivater, but after your report I will get one  .

Thank you.  Does anyone have any experience with Citrumelo plants that are not grafted or any "citrus hardy" plants that are not grafted

Mike Adams

I think there are some members which have experiences with coldhardy citrus, but to receive answers you should ask more detailed what you are interested in. I e.g. I have a Yuzu since 3 winters in ground, froze to earth in winter after a low of - 15° C and has now recovered again or a Dunstan citrumelo seedlings two year old in ground took -13° C this winter - all survived, some with slight damages, others with none, depending on genetics and microclimate of place.

Thanks Ilya, so glad that I have Morton in my garden - now it still has to bloom 

Hardyvermont, thank you. Good information. Also interesting that Sugarbelle ( tangelo minneola?) can take so deep cold, thought that she get killed earlier.
Mine are 2 and 3 winters now in ground and the biggest are Sanford Curafora and Keraji with about 1,5 m hight.

thanks, very interesting. I planted some 2 year old seedlings of Star ruby Grapefruit in front of my Glasshouse and protected them with air bubble fleece. I had inside the protection -8° C while outside we had - 13° after a few days with freeze and the seedlings had nearly no damage, so I was astonished how much they can take - and corresponds to your results with your Rio Reds.

I also have these white spots on some of my coldhardy in garden planted citrus after -13 ° C. Especially on the twigs of late summer, which are not fully hardened. But I agree that in combination with wintersun the damage gets quickly worse.

very nice fruits Kaz, saw that you also have Kaboshu, had the chance to buy it in a store this month, taste was not too bad but no comparison to sweet mandarins. I was main interested because if cold hardiness, but taste and cold hardiness (for my zone 7) are not satisfying for my opinion.
What are you using it for, while your other fruits are all delicious and sweet ?

I’ll 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.

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.

@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.

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 Chimäre 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.