Photo: Святослав ВласенкоCC BY 4.0via iNaturalistresized / cropped
Flowering rush Plant Care
Butomus junceus Turcz.
Updated · Sources · How we source care data
This aquatic plant is characterized by its long, sword-shaped leaves that can grow up to 3 feet tall. Butomus junceus originates from Europe and parts of Asia, and is highly sought after by plant collectors for its striking appearance and ability to thrive in wetland habitats.
Every 1–2 days
Full sun to partial shade
50–80°F
60–80%
At a glance
How do you care for Flowering rush?
Water Flowering rush every 1–2 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–80°F (10–27°C) and 60–80% humidity. Fertilize it every 2 months during the growing season.
Where Is the Flowering rush Native To?
- Albania
- Austria
- Belarus
- Belgium
- Bosnia and Herzegovina
- Bulgaria
- Croatia
- Cyprus
- Czechia
- Denmark
- Estonia
- Finland
- France
- Germany
- Greece
- Hungary
- Iceland
- Ireland
- Italy
- Latvia
- Lithuania
- Luxembourg
- Malta
- Moldova
- Montenegro
- North Macedonia
- Norway
- Poland
- Portugal
- Romania
- Russia
- Serbia
- Slovakia
- Slovenia
- Spain
- Sweden
- Switzerland
- The Netherlands
- Ukraine
- United Kingdom
What Is the Flowering rush?
Flowering rush (Butomus junceus) belongs to the Butomaceae family within the Butomus genus. Flowering rush is native to Europe and Asia. Flowering rush is also known as Grass rush, Ribbon grass.
Flowering rush displays a clump-forming aquatic perennial growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Flowering rush produces showy pink flowers arranged in umbels.
Leaf size: approximately 12 inches.
How Often Should You Water a Flowering rush?
Butomus junceus requires watering every 1–2 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 1–2 days
Let soil partially dry between waterings
What Light Does the Flowering rush Need?
Flowering rush thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Flowering rush Prefer?
Butomus junceus grows best at temperatures of 50–80°F. Flowering rush prefers humidity levels of 60–80%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
50–80°F
Humidity
60–80%
What Soil Mix Works Best for a Flowering rush?
Rich, loamy soil with good moisture retention. Good drainage is essential for Flowering rush to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Flowering rush?
Feed Flowering rush every 2 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 2 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Flowering rush?
Does not require repotting if grown in aquatic conditions. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Flowering rush?
Flowering rush can be propagated through division of rhizomes, seeds. Similar propagation techniques also apply to flowering rush plant care, which shares the same genus.
Is the Flowering rush Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Flowering rush, 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 Flowering rush?
Flowering rush is susceptible to aphids, leafhoppers, 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 Flowering rush Need?
Flowering rush grows outdoors in USDA Zone 3a – 9b. It survives winters down to planting zone 3a. Flowering rush is native to Europe and Asia.
Hardiness Zone
Zone 3a – 9b
Keep exploring plants
Flowering rush 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 Butomus genus — compare its care with other Butomus species on PlantoScan.
Butomus is part of the Butomaceae plant family — browse all Butomaceae genera and species.
Flowering rush 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: Butomus junceus Turcz., family Butomaceae (first published in Bull. Soc. Imp. Naturalistes Moscou 27(II): 60 (1854)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Flowering rush, 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.
- Photo: Святослав Власенко, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 3a – 9b, estimated from the plant's typical growing conditions.
- 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.
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