I think you mean the Marumi round kumquat?

not yet but on my list for next year.

I don’t have one, but would love to learn more bc if it could live in your ares, then it likely would survive in mine.

Laura.

it will probably grow outside in your area if it is grafted on to Poncirus trifoliata or Flying dragon. The tree can go down to 10F without leaf loss and down to 0F with out die back. The poncirus rootstock would hold dormancy if you got a few days in the 70,s in January. All other rootstock would start the growth process.

I wonder why most sources sell Nagami or Miewa, and so few have Nordman Nagami Seedless or Marumi.

Let's hear more about your fruit orchard project.

Looks like the marumi is a bit bigger and juicier then the meiwa? I wish I could taste one.

Cincinnati is allowing community gardens in city owned empty lots. I planted 8 red haven peach trees from seed and got donations of 4 grafted peaches. The civic garden center donated 5 Asian pear trees. 2 apple trees 2 sweet cherries 2 sour cherries, and 10 thorn less black berries. I rooted and donated 7 Hardy Chicago fig, and 10 raspberries trees. I think the community might spring to get a murami kumquat tree if I can have success with one. I have ruled out sitsuma Prague because tangerines are so cheap.

Thanks Steve! I wonder if FW grafts that variety onto FD...what about Stan McKenzie?

Stan used C35. (still fighting with this tree) I think FW has them on same root stock. I think Harris had meiwa too but no idea what they used as root stock. The one I got this week is on volk (I learned very frost sensitive). I hope I can get some grafted on trifoliate, FD and grapefruit next year. No iea how they are on their own root system.

Susanne

My Meiwa is from Harris and is on Kuhjarske Citrange. Harris does not carry Marumi that I can tell. Four Winds carries the Marumi but on what rootstock "Marumi Kumquat Similar to the Nagami, except with much smaller leaves and more round shaped fruit. The peel is also slightly thinner and sweeter. Diminutive and highly ornamental, the Marumi is rarely found outside of China and Japan".

TyTy carries them and they hint it is on sour orange rootstock $99.99 plus shipping. to much for a company of thier reputation.

Steve

Stan Mckenzie said he does not carry the marumi. Harris responded too and said they don't carry it either.

four winds has them in stock. Entry and premium. I wish I would have more room but don't.

Marumi kumquat has flown under my radar. Didn't know about it. But after reading about it, I'd like to get one. Some website say it's the most cold hardy citrus out there. Fourwinds growers has them in stock I see.

Jinny, how did I miss your post with great pics? I think the branch dieback is a kumquat issue. I have seen it with my kumquats and limequats. So far, mine seem fine, but I remember that is what happened to my other nagami last year and I could not save him. Keeping fingers crossed that they remain well this winter. The fruit you show look great! My nagami and fukushu both have lots of fruit but most are not ripe yet.

Steve, have you found any others places that sell Murami trees? I have only found fourwinds, and a bonsai site place that sells a murami bonsai. Other sites are all out of stock, that I've found.

I've almost decided to buy a premium Murami from fourwinds and have it in my shopping cart. Is Murami as slow growing as Meiwei?

I think it’s spelled Marumi. But I really doubt any kumquat will even tolerate 7a. I suspect this is a zone 8 plant where they have the possibility of getting down to 10 degrees maybe once every 5 years (with a very slight chance of upper single digits).

Just don’t get your hopes up. I think citrangequat is hardier than kumquat. Citrangequat might tolerate a very short duration of upper single digits, but only if daytime highs go well above freezing on a regular basis, plants are large and well-established, and there has not been a prolonged warm period just before the plunge. Citrus do not appreciate frozen soil.

You're right, Dave. Marumi. Do you think it would have much chance in ground in my area if I protect it on the most bitter cold nights?

Yes, I would give it a try. Just be ready with a tarp to throw over it. Might be best high-grafted onto trifoliate. Also try Changsha Mandarin and Thomasville Citrangequat.

Fourwinds graft to C-35 That will not take the cold temperatures that the marumi will take. Don't buy the tree yet. You have all winter to let the shop deal with winter problems. Sour orange, PT, and PT-FD are the 3 best rootstocks. I did find a nursery grafter that used sour orange. I don't remember though

https://www.naturehills.com/kumquat-marumi

The most cold-hardy citrus tree you can buy!

If you can say the word ‘kumquat’ and not instantly have your mouth start watering, then you’ve never tasted these little sour/sweet power bombs. Kumquats are small citrus fruit – no bigger than a golf ball, often as small as a half dollar – that pack a BIG citrus taste. You usually pop the whole thing in your mouth.

Marumi Kumquat, Fortunella japonica, is a breeding breakthrough and a boon for gardeners, especially those in colder northern climates. Of all citrus – oranges, lemons and limes included – Marumi Kumquat will survive the lowest temperatures. They often don’t show any damage even when the temps get down to 10 degrees. At 0 degrees they will lose their leaves, but by spring, the leaves will grow back! This winter dormancy is pretty remarkable and unheard of in other citrus trees.

Marumi Kumquat has small leaves and round fruit with thin, sweet skin that is edible. No need to peel. These trees do great in pots by a sunny window so that you can pick a few kumquats to snack on any time. They start producing in late fall and by Christmas you can have boughs of greenery with natural orange ‘ornaments’.

You get large established trees when you order from Nature Hills. These trees are a minimum of three years old, have extensive branching and some of the largest root systems available. We know that you won’t be disappointed with the Marumi Kumquat tree!

* Round sweet fruit
* Most cold-hardy citrus available
* Great in containers

Thanks, Steve. They were out of stock when I first looked there. It costs more, but I'd rather have a more cold hardy tree. Thanks for the good advice of letting the nursery do the winter care work. I'll watch the inventory number there, if it starts getting low I'll order one (if I still have the extra cash...).

Marumi Kumquat

https://www.gardenexpress.com.au/product/sweet-cumquat-marumi/

https://www.best-price-plants.com/Kumquat-Trees-The-Most-Cold-Hardy-Citrus-a/328.htm

I found one on the intern grafted to citrumelo Swingle 4475

http://exoticfruitplants.eu/index.php?route=product/product&path=70_71&product_id=98

this place also grafts Meiwa to the proper rootstock.

http://exoticfruitplants.eu/index.php?route=product/product&path=70_71&product_id=100

last but not least here is their phone number +420603285721

You're a better searcher than me - I haven't found anywhere else in stock other than FWG. They're done shipping to the east coast until late March, so I have some time to keep looking around.

jinnylea

Did your Marumi seeds sprout yet. If so how are they doing

Steve, I planted 2 Marumi Kumquat seeds (pre-soaked in warm water 24 hours) on December 4th using a styrofoam cup filled with a soiless potting mix. I also planted a few Calamondin seeds at the same time and put the cups of planted seeds on a double tin pie plate.. I then placed them on a shelf in my sunroom which is heated with a small cast iron wood stove. I forgot to wake up and feed the stove with wood one morning and the room was cold, ooops.. The seedling cups were cold so once I had the stove going I put the tin of cups of seed on the stove to warm up the soil real quick, while I started breakfast.. unfortunately the stove got hot quick and when I checked on the seeds a half hour later the bottom of the styrofoam cups had melted and I thought for sure that I had cooked the seeds.. not very smart of me.. ughh!! But, great news, One Marumi seed has sprouted! I am so happy because my Marumi Kumquat tree has a lot of branch dieback and not looking good.

Marumi should grow well on their own roots. I am looking for the article about using Marumi seedlings as rootstock.

Steve, you may try reaching out to 1 Dog Ventures (Lindy Savelle lindylamarsavelle@gmail.com) - they are propagating cold hardy citrus for UGA and claim to grow satsumas.

jinnylea

How is your Marumi seedling doing

Steve it is doing great so far, taking off like a weed.. lol

looks real nice. congratulations.

Is your seedling still growing and doing well

Steve, thanks for asking. The Marumi Kumquat seedling WAS doing well when I last checked on it Friday evening. I went outside early this morning to take a picture of it for you and discovered that all of my seedlings (on that tray) are missing. Gone! The seedlings were on a tray on my deck, Marumi, Calamondin and 2 Moro's. The tray was tipped over and the seedlings in their pots were gone. I searched all over the yard and found a couple of the pots but they were empty. I looked and looked for the plants in soil but to no avail. I have no idea exactly what happened except the neighbors 2 dogs were up on my deck Saturday and possibly knocked the tray over and the chickens got ahold of my seedlings. I was heartbroken but am over it now. It is what it is . I have no plans to purchase another Kumquat variety and I do still have 4, slow growing Nagami Kumquat seedlings that are doing great. I also have a fast growing Centennial Variagated Kumquat, so I will concentrate on the blessings and keep on planting and growing. Life goes on.. Lol

I tried to contact Nature Hills Nursery but they did not respond yet. I just wonder which rootstock they used on their Marumi Kumquat. I prefer Flying Dragon over Sour Orange rootstocks.

Flying dragon is the only good choice for the Marumi kumquat. That is the only combination I can grow in Cincinnati with little to no protection and have a living tree next spring. Standard PT would not offer quite the cold hardiness but would be a close second. Sour orange is only good to 10F to 20F range and is not compatible with kumquat trees.

Steve

Poncirusguy, did you successfully grow the marumi kumquat on FD rootstock in Cincinnati city, South of Ohio? I believe it should fall in zone 5b or lower, isn't it? That was so amazing, as I live in Atlanta, GA (zone 7b/8a), but many members at tropical-fruit-forum claimed that it is nearly impossible to grow any citrus in my area including citrangequat which will be bearly survived. The only rootstocks that I have now is FD because there were a few 40 years old FD trees at the recreation center of my University that offered a lot of fruits every year.

If you want to know about the citrus sold by Nature Hills, contact FourWinds as they supply the trees they sell on their site.

Marumi on C35. it wont go below 10F. It eeds to be on PT or FD. Ty Ty marumi tree advertisement of 0-F is fraudulentl.

Steve

Huyen I just caught your question now.

I have not been able to find an appropriately grafted Marumi to bother with growing it here. I average below 0F every 3 years. Marumi on FD will survive that. It is the next year with 6 nights below 0F with one dropping down to -9 that is the killer without protection. I have 3 glass enclosers with 2 being heated with a 23 watt bulb and the 3rd has seen no additional heat. They house a fukushu kumquat, an unheated New Zealand lemonade, and a valentine pomolo.

Steve

poncirusguy , do you have FD rootstock? I have seeds of pure FD which I collected from a pure FD trees at my former University. The 2 FD trees was about 40+ years old but was about 6' tall with no evidence of trimming work, very curved and contorted. Most of the FD Poncirus rootstocks from most nurseries was a mix of FD and standard Poncirus to become a semi-dwarf rootstock not the true dwarf rootstock (FD).

I am trying to find a few marumi seeds to grow seedlings and to collect scion wood from them. I don't trust nurseries since their tree might carry some type of citrus virus which would infect the rootstock as well. It takes about 2 years for a FD rootstock to be ready for grafting, so I don't want to waste rootstocks to experiment on diseased scion wood.

Huyen

If you find a place to buy the fruit let me know where.

Steve

It looks like I posted before your post went up. I have a couple of FD seedlings. They should be big enough to do an approach graft with a Meiwa cutting rooting tied to the FD. The end will be trying to produce roots while the approach graft fusses.

I wonder how Marumi taste would compare to Meiwa? Some source claimed that Meiwa is actually a hybrid from Nagami and Marumi Kumquat. If so why Meiwa is sweeter than Marumi while Nagami is sour.

There may have been 100,000 sample trees of this cross rased to fruit and 1 combined the sweetest genes from the nagami with the sweetest genes of the meiwa and get a tree that has fruit that is sweeter than the origional Marumi had.

mom and dad reproduce 200000 seeds of which 100,000 are hybrid seeds. The rest are nuclear.
1 of those seeds get all the high cards most fall in near average and a few others well you might as well grow Cuban shaddocks. We get all our scion wood from the original and its descendants.

Steve