Yuko Citrus Plant Care
Citrus yuko hort. ex Tanaka
Updated · Sources · How we source care data
The yūkō (ゆうこう), also written yukou, is a Japanese citrus found in the Nagasaki Prefecture and Saga Prefecture of Japan. Genetic analysis has shown it to be a cross between the kishumikan and koji, a part-tachibana orange hybrid native to Japan.
Every 7–14 days
Full sun
55–85°F
50–70%
At a glance
How do you care for Yuko Citrus?
Plant Yuko Citrus in full sun (USDA zones 12b) and water a young tree every 7–14 days until it is established. It tolerates temperatures of 55–85°F (13–29°C). Fertilize it every 4 months during the growing season.
Where Is the Yuko Citrus Native To?
What Is the Yuko Citrus?
Yuko Citrus (Citrus yuko) belongs to the Rutaceae family within the Citrus genus. Yuko Citrus is native to Japan.
Yuko Citrus displays a small to medium-sized evergreen tree growth habit, reaching up to 15 ft tall with a spread of approximately 10 ft. Yuko Citrus produces fragrant white flowers with waxy petals.
Leaf size: approximately 4 inches.
How Often Should You Water a Yuko Citrus?
Water a young or newly planted Yuko Citrus every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.
Watering Frequency
Every 7–14 days
Until established; then in dry spells
What Light Does the Yuko Citrus Need?
Yuko Citrus thrives in full sun.
Light Requirement
Full sun
What Temperature and Humidity Does the Yuko Citrus Prefer?
Citrus yuko tolerates temperatures of 55–85°F. Yuko Citrus prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
55–85°F
Humidity
50–70%
What Soil Mix Works Best for a Yuko Citrus?
Well-draining sandy loam with added organic matter. Good drainage is essential for Yuko Citrus to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Yuko Citrus?
Feed Yuko Citrus every 4 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.
Stop feeding by late summer so new growth can harden before winter.
Fertilizing
Every 4 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
Where Should You Plant a Yuko Citrus?
Choose a spot with full sun and well-draining sandy loam with added organic matter. Avoid low spots where water collects after rain.
Yuko Citrus is suited to USDA Zone 12b.
Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.
How Far Apart Should You Plant a Yuko Citrus?
Yuko Citrus can spread to about 10 ft (3 m) and reach about 15 ft (5 m) tall. Space plants about 10 ft (3 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.
Planning a row or hedge? Try the tree spacing calculator.
How Do You Prune a Yuko Citrus?
Prune Yuko Citrus while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.
If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.
How Do You Care for a Yuko Citrus in Winter?
Yuko Citrus is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.
How Do You Propagate a Yuko Citrus?
Yuko Citrus can be propagated through seeds, grafting, air-layering. Similar propagation techniques also apply to lemon tree plant care, which shares the same genus.
Is the Yuko Citrus Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Yuko Citrus, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Yuko Citrus?
Yuko Citrus is susceptible to citrus leafminer, citrus whitefly, aphids, scale insects. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Yuko Citrus Need?
Yuko Citrus grows outdoors in USDA Zone 12b. It survives winters down to planting zone 12b. Yuko Citrus is native to Japan. In cooler regions, grow Yuko Citrus as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12b
Keep exploring plants
Yuko Citrus is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Citrus genus — compare its care with other Citrus species on PlantoScan.
Citrus is part of the Rutaceae plant family — browse all Rutaceae genera and species.
Yuko Citrus thrives in bright light and direct sun — see other bright-light plants.
More Citrus Species
Other Citrus species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Citrus yuko hort. ex Tanaka, family Rutaceae (first published in Stud. Citrol. 7: 74 (1935)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Yuko Citrus, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Hardiness zone: USDA Zone 12b, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
