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World of CitrusWorld of CitrusKeraji Mandarin
University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc3144 (opens in a new tab)
Accessed
SoCal2warm · Tropical Fruit Forum · Cold Hardy Citrus · April 28th, 2022
https://www.tropicalfruitforum.com/index.php?topic=43392.msg458879#msg458879 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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tedburn · Tropical Fruit Forum · Cold Hardy Citrus · December 9th, 2025
https://www.tropicalfruitforum.com/index.php?topic=43470.msg571959#msg571959 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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tedburn · Tropical Fruit Forum · Cold Hardy Citrus · December 8th, 2025
https://www.tropicalfruitforum.com/index.php?topic=43470.msg571882#msg571882 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
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The Mulberries · YouTube · 2024-12-07
https://www.youtube.com/watch?v=CCnLabiS4MU (opens in a new tab)
Summary from transcript: Keraji appeared likely to lose much of its main stem and branches after rapid cold following a warm fall; greenhouse backup material existed (15:29–16:22).
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The Mulberries · YouTube · 2026-06-01
https://www.youtube.com/watch?v=pyh_HQv_bEg (opens in a new tab)
Summary from transcript: Keraji fruitlets followed unlabelled C-57 and TaiTri pollen applications; no pollen parent is assigned and no hybrid seedlings are confirmed (25:40–26:16).
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Tokurou Shimizu et al. · PLOS ONE · 2016-11-30
https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0166969 (opens in a new tab)
Open-access DNA-marker study (CC BY 4.0). Apply only to the study accessions and preserve the authors’ stated identity and parentage limits; it does not by itself establish the identity of every catalog tree or clone bearing a matching cultivar name.
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The Mulberries · YouTube · 2024-11-01
https://www.youtube.com/watch?v=t8xGcCvCu8Y (opens in a new tab)
Summary from transcript: English automatic captions reviewed 0:01–15:47 of 15:48. North Carolina farm tasting; Keraji was a green first fruit from a first-year trifoliate-rootstock graft. Captions are a source record, not an independent visual measurement check.
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Tom McClendon · YouTube · 2024-12-08
https://www.youtube.com/watch?v=9d3qbgUFOzM (opens in a new tab)
Summary from transcript: Tom McClendon describes a Keraji mandarin fruit as sweet and lemonade-like, with a mandarin character; he says its ripe rind falls away and is easier to peel than New Zealand Lemonade. He reports having grown it for a long time but does not establish the growing location. His Zone 8 hardiness statement has no described trial context.
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Todolí Citrus Fundació
https://todolicitrusfundacio.org/en/variedades-citricos/keraji-2/ (opens in a new tab)
TCF-111 varietal profile. Reports Keraji from Kikai-Jima, with a late-18th-century discovery report from Keraji village; describes tree, fruit and Japanese culinary uses. Its Kunenbo–Kikaimikan origin is stated as a hypothesis, not verified parentage. Qualitative cold wording is not a temperature threshold.
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Jacob G. Price · University of Georgia Cooperative Extension · 2023-01-24
https://fieldreport.caes.uga.edu/wp-content/uploads/2025/08/AP-127-1_1.pdf (opens in a new tab)
UGA Circular 1275 / Annual Publication 127-1, Table 1, printed p. 4. Keraji Mandarin on US-942, planted 2018; five-fruit pooled juice sample collected Dec. 15, 2021: 10.7 °Bx, 0.48% titratable acidity, ratio 22.3. Single pooled sample; do not infer taste-intensity categories from chemistry.
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SoCal2warm · Tropical Fruit Forum · Cold Hardy Citrus · 2017-12-20
https://www.tropicalfruitforum.com/index.php?topic=26301.0 (opens in a new tab)
Thread started 2017-12-20; relevant posts include Moro #8 (msg314070), Ilya11 #11/#15 (msg314309/msg314341), and seed/identity discussion #17–29. Contains separate grower accounts for different Keraji specimens and conditions; reports are not an independent hardiness trial. Do not collapse them into one plant or a cultivar-wide temperature threshold.
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IDaids Citrus ID · Edition 2
https://idtools.org/citrus_id/index.cfm?packageID=1179&entityID=8616 (opens in a new tab)
Keraji entry in Citrus ID Edition 2 (edition dated October 2011; no entry author shown). Morphology and taxonomic text cites Cottin (2002), including Swingle & Reece (1967) through Cottin. Descriptive “acidic-sweet” wording is not a taste-intensity rating and the entry does not establish origin or parentage.
Accessed
Sweet Home Alabama Homestead · YouTube
https://www.youtube.com/watch?v=NuvACBIOl_s (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed. At 2:05–2:26, the presenter identifies and tastes a Keraji sample, describing it as easy to peel with little aroma and a pleasant flavor; at 3:11–3:20, displayed fruit from both varieties is described as seedless, with the speaker questioning whether this is typical. Single cut-fruit observations only; no Keraji taste intensity, tree, site, rootstock, harvest date or hardiness event is established.
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Tom McClendon · YouTube
https://www.youtube.com/watch?v=oVWMgrRJSYo (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed. At 0:15–0:30, McClendon says his Keraji was hit hard by the Christmas 2022 freeze and returned well; at 0:30–0:51 he shows a heavy fruit load. He gives no tree-level temperature, duration, protection, rootstock, exact recording date or measured yield, so this is an attributed recovery and crop-load report, not a hardiness threshold.
Accessed
Tom McClendon · YouTube
https://www.youtube.com/watch?v=Sid3cJQKiCI (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed. McClendon dates the tasting to Jan. 5, 2025 (spoken, not upload date). He describes a Georgia Keraji tree unprotected since 2017, slight branch dieback in the 2022 Christmas freeze and heavy rebound; late fruit is easy to peel and can dry as the season advances. He describes a lemonade-tangerine flavor and uses the peel for marmalade, while qualified peel bitterness/sweetness refers to rind, not whole-flesh taste. Rootstock, exact site, cold minimum and duration are unstated.
Accessed
Tom McClendon · YouTube
https://www.youtube.com/watch?v=3aM3tejxqYU (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed. McClendon dates this tasting to Sept. 3, 2024 (spoken, not upload date). At 1:44–2:42 he describes and tastes one early-season Keraji fruit as very juicy and easy to peel, saying it is “a little tart but a lot of sweet”; this single sample supports low sourness and high sweetness descriptions/categories. No instrument readings, fruit weight, rootstock or cold event is established.
Accessed
Tom McClendon · YouTube
https://www.youtube.com/watch?v=UR0ooUwHaPQ (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed 0:01–10:08. McClendon dates the tasting to Nov. 2, 2024 (spoken, not upload date). He says his Keraji was planted in-ground around 2018, hit hard in the Christmas 2022 freeze, rebounded and made a large 2024 crop; fruit was beginning to color and might hang until about February if not frozen. He describes oblate fruit with variable size and seediness and a lemonade-tangerine flavor. No measured cold minimum, rootstock or exact location is established.
Accessed
Tom McClendon · YouTube
https://www.youtube.com/watch?v=w-APGCxfxx4 (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed 0:01–10:58. McClendon dates the observation to Jan. 24, 2025 (spoken, not upload date); page associates it with Greene County, Georgia. He says the in-ground Keraji planted since 2018 was hit hard in the 2022 Christmas freeze, fruited well in 2024 and retained some fruit. A regional 19–20°F low is not an instrumented tree temperature or a cultivar threshold; rootstock and event duration are unstated. Crop-load/cold-tenderness is presented as speculation.
Accessed
Tom McClendon · YouTube
https://www.youtube.com/watch?v=7elhhuy7L5M (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed 0:02–12:42. McClendon dates this observation to July 7, 2025 (spoken, not upload date). At 10:50–11:22 he describes his in-ground Keraji as planted since 2018, vigorous and heavily loaded; fruit becomes edible around mid-October and may remain until February if freezes are kept off. This is a grower report, not a measured cold threshold; no rootstock or tree-specific protection is described.
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Virginia Fruit Grower · YouTube · 2020-07-14
https://www.youtube.com/watch?v=fzj21Rxrr34 (opens in a new tab)
Summary from transcript: English auto-generated captions reviewed 0:05–20:50 of 20:58. At 9:22–9:54, the speaker identifies Keraji/Karaji and describes it as delicious, among the best-tasting hardy citrus, with a “lemonade-ish” taste. A later 11:20–11:55 passage is not used because the cultivar attribution is uncertain.
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Skandiberg · Tropical Fruit Forum · 2025-11-19
https://www.tropicalfruitforum.com/index.php?topic=60062.msg570919#msg570919 (opens in a new tab)
The original post describes a received Keraji fruit with eight large seeds and two empty seeds, zipper peel, and intended out-of-hand use. A later edit adds a Brix reading of 11 after the author had said another fruit would be used for the reading; it is therefore not established that Brix and seed counts refer to the same fruit. The shipment orchard provenance is unstated; none of the fruit was from the author’s own trees.
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Skandiberg · Tropical Fruit Forum · Cold Hardy Citrus · 2026-07-23
https://www.tropicalfruitforum.com/index.php?msg=586437 (opens in a new tab)
Post #148 identifies the observed plant as Keraji D14 and reports two new shoots about 30 cm long after roughly two weeks, still growing. The post does not document an accession source, propagation history or site. Preserve D14 as the poster's specimen label; do not infer that it represents all Keraji material.
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Hiroshi Fujii et al. · Breeding Science 66(5):683–691 · 2016-10-15
https://pmc.ncbi.nlm.nih.gov/articles/PMC5282755/ (opens in a new tab)
MARCO analysis of 206 validated SNPs across 67 citrus varieties/lines reports a candidate parent combination for Keraji accession JP No. 117389 (Table 1: C. keraji, origin field Japan/Kagoshima, held at NIFTS Kuchinotsu): Kunenbo [17] × Kabuchi [39] (Table 4 row 40). Table 4 footnote b applies to this row and states that seed/pollen-parent direction is unclear. This is accession-scoped candidate parentage, not a directional cross or identification of every Keraji-named tree.
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imgrimmer · Homegrown Goodness / ProBoards
Reviewed from the five-page user-supplied HTML capture. This citation covers imgrimmer’s July 18, 2017 post #123312 and the previously discussed June 19 posts #122782 and #122787 about the unaccessioned flowering seedling he called Ichang Papeda. He could not determine whether either reciprocal pollination would take; no fruit set or offspring outcome is reported. This citation is limited to that report and does not cover unrelated May 2017 seedling-cross labels.
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