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World of CitrusWorld of CitrusBloomsweet Grapefruit
University of California, Riverside — Citrus Variety Collection
https://citrusvariety.ucr.edu/crc3465 (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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SoCal2warm · Tropical Fruit Forum · Cold Hardy Citrus · June 3rd, 2026
https://www.tropicalfruitforum.com/index.php?topic=61056.msg582982#msg582982 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
Accessed
Ilya11 · Tropical Fruit Forum · Cold Hardy Citrus · February 27th, 2016
https://www.tropicalfruitforum.com/index.php?topic=19167.msg240021#msg240021 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
Accessed
Ilya11 · Tropical Fruit Forum · Cold Hardy Citrus · February 25th, 2025
https://www.tropicalfruitforum.com/index.php?topic=57841.msg547804#msg547804 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
Accessed
tedburn · Tropical Fruit Forum · Cold Hardy Citrus · November 2nd, 2025
https://www.tropicalfruitforum.com/index.php?topic=43470.msg569955#msg569955 (opens in a new tab)
First-hand forum account, paraphrased; not an independently verified trial.
Accessed
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.
Accessed
Clayton Bell · The Bell House — Growing Fruit Trees in Northwest Houston · December 27, 2019
https://thebellhouse.weebly.com/home/bloomsweet-grapefruit-kinkoji (opens in a new tab)
Clayton Bell's account concerns his own backyard tree in Northwest Houston, labelled Bloomsweet/Kinkoji and planted roughly six years before the initial 2019 harvest; accession, rootstock, harvest date, and fruit analysis are not provided. The initial fruit is described as thick-pithed, firm, seedy, relatively low in juice, and not particularly easy to peel; the author found it mild and underwhelming, but explicitly says it was sweet with faint lemon/pummelo notes. The February 10, 2020 update describes a different sample from Dr. Randall's tree as amazing, like a lemon-flavored pummelo; the author speculates that his own tree may have been immature. Keep the specimens and judgments separate. The article equates Bloomsweet with Kinkoji and asserts pummelo × mandarin parentage without documenting an accession or basis. Comments are separate third-party reports, not observations of the author's tree. Retrieved passages and locators are retained in the local Bloomsweet research report.
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Weird Explorer · YouTube · May 5, 2021
https://www.youtube.com/watch?v=3lU3IZlqDWk (opens in a new tab)
Summary from transcript: English transcript reviewed from 0:00 through 6:46; relevant Bloomsweet passage is 0:56–3:11. The speaker identifies the fruit as Bloomsweet/Kinkoji and says he believes it is available in Japan; he guesses pomelo × mandarin ancestry (1:04–1:27), not a verified pedigree. The sample was sent by the Monterey Bay chapter of the California Rare Fruit Growers (0:40); its growing location, harvest date, tree, and rootstock are unspecified. Direct observations: very tough skin; firm flesh with tough membranes; flavor between orange and grapefruit with floral/citron notes (1:40–2:30). Subjective ratings are sourness initially 4 rising to 6 and sweetness 4/10 (2:38–2:55); the rating scale anchors are unspecified. Speaker nevertheless found it good despite unusual texture. Melogold discussion later in the video is a different variety. Raw transcript and timestamp locators are retained in the local Bloomsweet research report.
Accessed
The Mulberries · YouTube · February 22, 2026
https://www.youtube.com/watch?v=nXOq02BG0mk (opens in a new tab)
Summary from transcript: English transcript reviewed from 0:01 through 25:59; Bloomsweet discussion runs through the tasting and measurements. The fruit was gifted by Stan McKenzie (0:27); no further provenance for the gifted fruit is established. Separately, the narrator says he has a juvenile plant and keeps the variety in an unheated greenhouse with thermal tanks (0:20; 3:13–3:45); the transcript does not establish that the gifted fruit came from this plant. One sample weighed 580 g (4:50–4:59), was picked in February and later than preferred, and was dry with ricey vesicles; the presenter says this may have affected juiciness and flavor. Measured readings reported from this fruit: 9 °Brix (19:05) and an imprecise visual pH-strip estimate somewhere in the threes, explicitly not a proper test (16:56–20:39). Tasting includes pomelo/sweet-orange/sweet-lemon notes, sweetness described as sweet, very slight bitterness, and very little sourness described as between balanced and slightly mild. The companion Mulberries scorecard is the same tasting and must not be counted as an independent sample; keep its transcribed ratings separate from sensory intensity categories. Raw transcript and relevant timestamped evidence are retained in the local Bloomsweet report.
Accessed
Scott / New Garden Road · YouTube · December 22, 2024
https://www.youtube.com/watch?v=Tl9HHKwLb8I (opens in a new tab)
Summary from transcript: auto-generated English captions reviewed across 0:00–8:00 of this 8:03 video; raw capture and timestamp report retained in the local Bloomsweet research packet. Scott identifies his Austin backyard tree as Bloomsweet / “The Golden Citrus”; at 0:56–1:19 he gives general descriptions of sweet/floral aroma, mild tartness, lemon-flavored pummelo, variable oval-to-round shape, and green-to-lemon-yellow ripening. These are grower descriptions, not accession-verified cultivar traits. He reports planting on the south side of his Austin home in May 2011 (0:00–0:44). For the Feb. 2021 winter storm he reports local single-digit °F weather and six days below freezing; he wrapped the graft base, lost upper canopy, and later observed regrowth (5:03–6:53). Exact minimum temperature and daily hours below freezing were not provided; his general 14°F hardiness rating is not a measured exposure. He later describes a tent with incandescent lights/frost cloth and about a dozen fruit the following season, with chronology not fully clear (6:08–7:20). His transcript describes the tasted fruit as sweet, juicy, lemon-like and grapefruit-like (4:30–4:56); the object of “pretty bitter” at 3:35–3:47 is ambiguous, so bitterness is not asserted. Fruit source, rootstock, sampling date, size, and analytical measurements are not established. The ancestry statement is source opinion and does not verify catalog parentage. Transcript claims are speaker reports; no visible thermometer or instrument reading was reviewed.
Accessed
Citradia · The Tropical Fruit Forum · 2015-10-25
https://www.tropicalfruitforum.com/index.php?topic=18065.0 (opens in a new tab)
Forum thread; relevant Bloomsweet reports are in posts #2 and #5. Thread title uses the Crocston spelling.
Accessed
jibro (attributed in user-provided excerpt) · Citrus Growers Forum (ProBoards)
Summary from user-provided translated excerpt: The supplied attachment attributes a Feb. 3, 2024 post to jibro and says it reproduces an AI DeepL translation of a Tiny Mandragore nursery listing. The excerpt says the nursery's Bloomsweet plant withstood −12°C without too much damage, with fruiting reduced the following year; it says protection from cold winds is essential. These are translated, second-hand nursery claims about its plant, not an independently verified trial or a measurement by the forum poster. The full thread and original nursery text were not independently retrieved. The excerpt supplies no exact site, event date, exposure duration, temperature instrument, tree age, rootstock, or quantified recovery method; preserve the stated cold-wind qualification.
Accessed
The Mulberries
Companion taste scorecard titled “Kinkoji Bloomsweet Grapefruit.” The catalog record has the existing Kinkoji alias for Bloomsweet Grapefruit; this is recorded under that existing identity, not as a separate variety. Printed sweetness/sourness/bitterness ratings are 8/6.5/8; under the owner-directed catalog conversion, scores are 8/3.5/2 (sweetness unchanged; sourness and bitterness are 10 minus printed ratings). This source establishes the printed preference ratings only; no verified harvest date or measurement method is given.
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