Kadua parvula Plant Care
Kadua parvula A.Gray
Updated · Sources · How we source care data
Kadua parvula is a rare species of flowering plant in the coffee family known by the common name rockface star-violet. It is endemic to Hawaii, where it is known only from the Waiʻanae Range on the island of Oahu.
Every 7–10 days
Bright indirect to partial shade
60–75°F
50–70%
At a glance
How do you care for Kadua parvula?
Plant Kadua parvula in bright indirect to partial shade (USDA zones 13a) and water a young shrub every 7–10 days until it is established. It tolerates temperatures of 60–75°F (16–24°C). Fertilize it every 6 months during the growing season.
Where Is the Kadua parvula Native To?
What Is the Kadua parvula?
Kadua parvula (Kadua parvula) belongs to the Rubiaceae family within the Kadua genus. Kadua parvula is native to Hawaii.
Kadua parvula displays a low spreading shrub growth habit, reaching up to 1.5 ft tall with a spread of approximately 2 ft. Kadua parvula produces small white or pink tubular flowers in clusters.
Leaf size: approximately 3 inches.
How Often Should You Water a Kadua parvula?
Water a young or newly planted Kadua parvula every 7–10 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.
Watering Frequency
Every 7–10 days
Until established; then in dry spells
What Light Does the Kadua parvula Need?
Kadua parvula thrives in bright indirect to partial shade. Avoid placing Kadua parvula in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Bright indirect to partial shade
What Temperature and Humidity Does the Kadua parvula Prefer?
Kadua parvula tolerates temperatures of 60–75°F. Kadua parvula prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–75°F
Humidity
50–70%
What Soil Mix Works Best for a Kadua parvula?
Well-draining, acidic soil with high organic matter content. Good drainage is essential for Kadua parvula to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Kadua parvula?
Feed Kadua parvula every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs 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 6 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 Kadua parvula?
Choose a spot with bright indirect to partial shade and well-draining, acidic soil with high organic matter content. Avoid low spots where water collects after rain.
Kadua parvula is suited to USDA Zone 13a.
Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.
How Far Apart Should You Plant a Kadua parvula?
Kadua parvula can spread to about 2 ft (0.6 m) and reach about 2 ft (0 m) tall. Space plants about 2 ft (0.6 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 plant spacing calculator.
How Do You Prune a Kadua parvula?
Prune Kadua parvula 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 shrub in one year.
How Do You Care for a Kadua parvula in Winter?
Kadua parvula is frost-tender (hardy to USDA zone 13). 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 Kadua parvula?
Kadua parvula can be propagated through stem cuttings, division, seeds. Similar propagation techniques also apply to kadua cookiana plant care, which shares the same genus.
Is the Kadua parvula Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Kadua parvula, 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 Kadua parvula?
Kadua parvula is susceptible to aphids, scale insects, spider mites. 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 Kadua parvula Need?
Kadua parvula grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. Kadua parvula is native to Hawaii. In cooler regions, grow Kadua parvula as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Kadua parvula 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 Kadua genus — compare its care with other Kadua species on PlantoScan.
Kadua is part of the Rubiaceae plant family — browse all Rubiaceae genera and species.
Kadua parvula thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Kadua parvula A.Gray, family Rubiaceae (first published in Proc. Amer. Acad. Arts 4: 317 (1860)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Kadua parvula, 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 13a, 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.
