I'm growing a Dunstan citrumelo outside in Olympia, WA. So far it is doing great. Maybe only three feet tall right now, so it is still too small to produce fruit. I have seen a citrumelo tree outside, up against a wall, in Vancouver, WA, in a suburban neighborhood. Don't know exactly what variety it was. Pretty big tree, about 6 feet tall. I saw several medium-sized green fruits on it. I don't know if they ripen all the way. Both locations are classified in climate zone 8a. I'm also experimenting growing what they call a "Bloomsweet grapefruit". Research I've dug up shows that it probably originated from a cross between a Japanese citrus variety known as "kunenbo" and a "buntan" (Japanese pomelo). Kunenbo is like a large sized mandarin, very fragrant but seedy, perhaps also a little bit comparable to a tangelo as well. It really has no exact equivalent to any normal citrus outside of Asia. Just for further helpful reference, common Satsuma mandarin is believed to have originated from a cross between Kishu mandarin (which is sometimes known as "Pixie") and Kunenbo. So Satsuma gets most of its distinct flavor from Kunenbo. It's a long story with many complex details. Probably this is the same variety that was known as "Kinkoji" in Japan, was probably later brought over by Japanese immigrant citrus farmers who moved to Texas, and there was given its new name "Bloomsweet" in Texas. And from there it has occasionally been grown in South Carolina. This "Bloomsweet" is not really a "real" grapefruit, but that is the closest most apt description of it. The flowers smells more like sour orange flowers than those of grapefruit. Anyway, the tree is planted close to a warm south-facing brick wall, and has survived through two winters so far. The first winter was very cold with lots of snow (which was unusual for this area), and it was covered for protection. Suffered severe bark damage, lost most of its leaves. The second winter (2019-2020) it was not protected. Seems to have done well. Amazingly the leaves from last year seem to have mostly recovered (regained their green color after turning yellow) and it has put out a whole new stem full of big leaves. It remains to be seen how this will do. Sorry, there are just too many details to write them all here. From the research I've been able to do (mostly reading other people's anecdotal observations, failures and successes, in other forums) I have gathered that Bloomsweet is probably hardy down to about 18 F or in the range 15-23 F, and I can also state from my own observations it probably has slightly more cold tolerance than Satsuma. Anyway, I planted the two right next to each other, in perhaps the hope that I might someday be able to develop a new cross between these two varieties, trying to develop a better hardy grapefruit. I'm probably getting ahead of myself with that thought, however.

Flavor will often depend in growing conditions and is quite subjective. My favs: Sweet orange: Trovita--very productive; Lane Late--very productive; (Cara-cara only ok here on a very young tree, but really good from the grocery store :) Mandarin: Pixie, Clementine, [Satsuma (Owari)], Gold Nugget--all quite productive. Grapefruit: hybrids Cocktail grapefruit (soo good!) and Oroblanco. I never met a tangelo that I like. Minneola seems to be an aggressive grower, haven't had home-grown fruit. Temple Tangors (aka Royal mandarin) and Ortaniques are supposed to be very good, but I haven't liked them much though I have yet to have home-grown. I fully expect the Temple to not be good here, but you may do well with them in a greenhouse setting (they like heat). You may wish to think about a pummelo (like Chandler), or sweet acidless citrus like Palestine sweet limes or Mexican sweet lemons--quite interesting fruit that you may not be able to purchase easily. I like the acidless ones, though I agree with descriptions that the typical American palate may find them a little insipid. Sour/bitter oranges I find very easy to grow and are quite ornamental. HTH.

I happened to see your post here and want to pass along what an employee at the San Antonio, Texas Antique Rose Emporium told us very recently. They have three Changshas. One of them gets watered by the sprinkling system and the other two do not. The better irrigated one had tastier fruit, she said, and fruited earlier. In fact it had no fruit left for us to taste. The other two, which did not get supplemental water in last summer's drought, (but got some pretty good rain about a month ago) still tasted pretty good to me, but as you say, not as tangy as they tasted last year. Don't know if that works with Satsuma trees or not. Maybe last month's rain diluted the juice and therefore the tangy taste. Just an idea to consider. Maybe someone better aquainted with citrus trees will know. Changsha trees without supplemental water:

Hmmmm, just an idea... maybe contact Franz? They might be able to tag the order and ship the exact variety you want. [?] I've asked them for their code list in the past without success.. I was trying to find out all the varieties they offer. I was able to piece together the list below. it is NOT intended to be an availability list. I think they had a Rootstock coded R16, but cannot be sure as it was seen years ago. This is from the last couple of seasons' sightings at Costco: FDG Flying Dragon CZO Carrizo C35 C-35 VLK Volk Scions: MEX Mexican Lime AEU Eureka Lemon IMM Improved Meyer Lemon TNG Tango Mandarin FOW Frost Owari Satsuma OKT Okitsu Wase Satsuma PER Persian Lime BER Bearss Lime PAW Parent Washington Navel MBL Moro Blood Orange CLN Clementine Mandarin ORB Oroblanco Grapefruit NWH Newhall Navel Orange FIS Fisher Navel Orange IMQ Indio Mandarinquat 8AL Lisbon Lemon (8A) VPE V. Pink Eureka Lemon STR Star Ruby Grapefruit RIO Rio Red Grapefruit BUH Buhda's Hand Citron EUS Eustis Limequat BRT (bream) Tarocco Orange HON (California) Honey Mandarin DCY Dancy Mandarin GNG Gold Nugget Mandarin FKS Fukushu Kumquat SAN Sanguinelli THL Thornless Mexican Lime KIE Kieffer Lime YUZ Yuzu Lemon RBT Robertson Navel Orange