Flying Dragon: Sources | World of Citrus

Genome resource reviewed against the CGD assembly record and existing variety identity. ZK8 is a Poncirus trifoliata reference, not the Flying Dragon selection. It can support comparisons within trifoliate orange but does not establish Flying Dragon’s sequence or dwarfing alleles.

Accessed September 19th

[6]

Poncirus trifoliata ‘Flying Dragon’ (opens in a new tab)

Oregon State University — Landscape Plants

https://landscapeplants.oregonstate.edu/plants/poncirus-trifoliata-flying-dragon (opens in a new tab)

Cultivar profile describing twisted stems and spines, deciduous trifoliate foliage, white flowers and green-to-yellow very sour fruit. Lists USDA Zone 5 and a 1915 introduction to the United States from Japan; no measured cold exposure or specific accession is given.

Accessed September 19th

[7]

Origin and Inheritance of Dwarfing by the Citrus Rootstock Poncirus trifoliata ‘Flying Dragon’ (opens in a new tab)

Frank Suozhan Cheng and Mikeal L. Roose · Journal of the American Society for Horticultural Science · March 1995

https://doi.org/10.21273/jashs.120.2.286 (opens in a new tab)

The publisher full text was unavailable during review (XML 403; PDF 404). A complete abstract was recovered through Crossref JATS at CiNii Research and independently through the National Agricultural Library’s AGRIS record. The abstract reports results for open-pollinated Flying Dragon seedlings and Cutter Valencia field grafts; its mutation and no-later-sexual-recombination conclusion is an author inference, not direct proof of the cultivar’s origin.

Accessed September 19th

[8]

Flying Dragon citrus that survives -15 degrees #rarefruit #backyardorchard (opens in a new tab)

Andre Ferreira (@junecity.studio) · YouTube · August 28, 2025

https://www.youtube.com/watch?v=63tWBwXJfD8 (opens in a new tab)

Watch on YouTube

Summary from transcript: The speaker identifies his own Flying Dragon tree (0:00–0:10) and says Connecticut winters have caused no issues (0:17–0:23). The title’s −15 claim conflicts with captions that say minus 5 without a scale; no numeric minimum is recorded.

Accessed September 19th

[9]

Grow Your DREAM Flying Dragon Cold Hardy Orange Tree (opens in a new tab)

GreenBiz Nursery & Landscaping Inc · YouTube · October 23, 2024

https://www.youtube.com/watch?v=9zxUfnacvss (opens in a new tab)

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Summary from transcript: The presenter uses Poncirus trifoliata, bitter orange, and Flying Dragon interchangeably (0:15–0:22). Generic-presenter claims include a 13–26-foot height range (0:45–0:54), extremely sour and seedy fruit used for marmalade (3:05–3:40), and rootstock effects introduced as “I read” or “I understand” (1:58–2:32), rather than a documented trial.

Accessed September 19th

[10]

Flying Dragon Trifoliate Orange Citrus trifoliata (opens in a new tab)

Great Escape Farms · YouTube · January 1, 2018

https://www.youtube.com/watch?v=qhv6PHXh-yk (opens in a new tab)

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Summary from transcript: The presenter visits Michael Judd’s food forest in the third week of September, with no year stated (0:21–0:24; 0:51–0:53). He describes fruit beginning to turn orange (0:43–0:58), informally compares fruiting on sunnier and shaded trees (1:01–1:20), and describes very small, seedy fruit with little flesh and lemon-orange flavor (2:29–2:44). The recovered captions do not document a taste-test method.

Accessed September 19th

[11]

Flying Dragon Trifolate Orange Flowers and Fruit (opens in a new tab)

Great Escape Farms · YouTube · May 22, 2023

https://www.youtube.com/watch?v=_rO-jfMfn2k (opens in a new tab)

Watch on YouTube

Summary from transcript: This three-year compilation reports 2023 late-freeze tip damage and recovery (0:27–0:50). In a clip explicitly dated May 21, 2023, the speaker says the plant recovered and carried plenty of fruit (3:13–4:12); “25 degrees” has no stated temperature scale and is not recorded as a minimum. Other clips show April 8 buds, April 14 blooms, and April 30 fruit without a confirmed year.

Accessed September 19th

[12]

Flying Dragon Oranges - Cold Hardy Citrus - Poncirus Trifoliata (opens in a new tab)

Conscientious Omnivore · YouTube · October 18, 2018

https://www.youtube.com/watch?v=uwIR9igMDQQ (opens in a new tab)

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Summary from transcript: The speaker presents a first-hand taste account of fruit from a sunny Hungarian street or hillside, but says he is not 100% sure of the identity (0:07–0:10) and later calls it likely Flying Dragon or Poncirus trifoliata while requesting confirmation (6:42–7:18). User confirmation identifies this video as Flying Dragon; the speaker’s specimen uncertainty remains.

Accessed September 19th

[13]

Cold Hardy Citrus Taste Test - Thomasville Citrangequat (opens in a new tab)

The Mulberries · YouTube · 2025-01-13

https://www.youtube.com/watch?v=bAVid6H5ZLc (opens in a new tab)

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Summary from transcript: English automatic captions reviewed 0:01–25:01 of 25:02. Thomasville fruit came from small, potted Flying Dragon-rootstock plants; raw timestamped capture is retained in the Thomasville citrangequat research archive.

Accessed September 20th

[14]

Five New Citrus Rootstocks with Improved Tolerance to Huanglongbing (opens in a new tab)

Kim D. Bowman and Greg McCollum · HortScience 50(11):1731–1734 · November 2015

https://doi.org/10.21273/HORTSCI.50.11.1731 (opens in a new tab)

Hamlin sweet-orange yield on rootstocks in two Florida trials; performance depended on site, disease and management. Values describe grafted scion trees, not rootstock fruit traits.

Accessed September 20th

[15]

Growing Yuzu and Sudachi in South Coastal British Columbia (opens in a new tab)

Bob Duncan · Fruit Trees and More · YouTube

https://www.youtube.com/watch?v=n5nbeHPjj2w (opens in a new tab)

Watch on YouTube

Summary from transcript: English auto-generated captions reviewed 0:00–8:43 of 8:43. At 5:29–5:35, Bob Duncan identifies Flying Dragon as the rootstock on his Yuzu and says it dwarfs that tree. This is a rootstock-use report about that Yuzu; the video gives no Flying Dragon fruit or independent rootstock trial.

Accessed September 27th

[16]

Planting Yuzu & Sudachi in Cold Climates - Will They Survive? An Experiment (opens in a new tab)

Ross Raddi · Fig Boss · YouTube

https://www.youtube.com/watch?v=Gakypf9Wu3U (opens in a new tab)

Watch on YouTube

Summary from transcript: English auto-generated captions reviewed 0:00–5:54 of 5:57. At 5:17–5:47, Ross Raddi says Flying Dragon can be grown in-ground in his zone 7 area, but describes the plants as very thorny and difficult to manage and their eating quality as very poor; he says people are trying to improve its flavor. These are his attributed opinions, not a comparative trial or measured hardiness result.

Accessed September 27th

[17]

'Parson Brown' Sweet Orange Performance in a Rootstock Planting (opens in a new tab)

William S. Castle; James C. Baldwin · Proceedings of the Florida State Horticultural Society · 2010

https://www.researchgate.net/publication/272091086_Parson_Brown_Sweet_Orange_Performance_in_a_Rootstock_Planting (opens in a new tab)

Castle and Baldwin, Proc. Fla. State Hort. Soc. 123:78–81 (2010), report one unreplicated Basinger, Florida planting of Parson Brown clone PB-S-F-56-2-XE on 19 rootstocks. Yields were measured over nine seasons (1992–93 through 2000–01); the authors did not statistically compare means. Rootstock-specific outcomes are confined to this clone and planting, not own-fruit or general cultivar traits.

Accessed September 30th

[18]

F2 citrange winter hardiness trial — Flying Dragon ripening report (opens in a new tab)

hardyvermont · Tropical Fruit Forum · Cold Hardy Citrus · September 24, 2026

https://www.tropicalfruitforum.com/index.php?msg=589998 (opens in a new tab)

In reply #994, hardyvermont reports that their Flying Dragon ripens before their other Poncirus and says it had been yellow for a couple of weeks. The author says the plant came from Stan. This is one grower’s report; no harvest date, location, sample count, or absolute ripening date is supplied.

Accessed October 3rd

[19]

Yes, you can grow citrus in the Pacific Northwest. Here’s how to get started (opens in a new tab)

Dennis Peck · The Oregonian/OregonLive · 2022-01-13

https://www.oregonlive.com/hg/2022/01/yes-you-can-grow-citrus-in-the-pacific-northwest-heres-how-to-get-started.html (opens in a new tab)

The article’s “ONE GREEN WORLD FAVORITES” block says descriptions are from OneGreenWorld.com. The profile describes a dwarf deciduous tree with contorted branches and hooked thorns, yellow fruit around 2 inches, fragrant lemon-seasoning juice, and a reported 0°F-or-lower hardiness claim. No identified accession, measured exposure, duration, damage endpoint or site is given.

Accessed October 7th

[20]

Determination of Genome Size Differentiation and Ploidy Levels in Some Citrus Rootstock Populations (opens in a new tab)

Sefa Polatöz; Murat Şeker; Çağlar Kaya · KSU Journal of Agriculture and Nature · 2025

https://dogadergi.ksu.edu.tr/en/pub/article/1475151 (opens in a new tab)

The study examined seedling populations from open-pollinated rootstock fruits collected in Adana, Türkiye. Two hundred seeds per rootstock type were sown and 100 seedlings per population were analyzed by flow cytometry. The authors report diploid genome sizes for all assessed populations. The study measured ploidy/genome size, not embryo origin or clonal identity, and does not establish a zygotic-seedling percentage.

Accessed Yesterday