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Reed Canary Grass (Phalaris arundinacea)

Phalaris arundinacea, Ribbon Grass, is a vigorous, rhizomatous perennial grass. It has variegated foliage, thrives in moist to wet soils, and is known for its invasive na

Above information is sourced from Wikipedia

Sunlight

Thrives in full sun but can tolerate partial shade.

Watering

Requires consistently moist to wet soil; tolerates standing water.

Soil

Moist to wet, fertile, adaptable

Temperature

Highly hardy, tolerating a wide range from -30°C to 30°C.

Habitat

Outdoor, Aquatic

Fertilizer

Generally not needed; can encourage invasive growth.

Care Requirements

Light

Thrives in full sun but can tolerate partial shade.

Water

Requires consistently moist to wet soil; tolerates standing water.

Soil

Moist to wet, fertile, adaptable

Temperature

Highly hardy, tolerating a wide range from -30°C to 30°C.

Habitat

Outdoor, Aquatic

Fertilizer

Generally not needed; can encourage invasive growth.

Plant Overview

Plant Type

Grass, Herb

Plant Category

Ornamental, Foliage

Plant Place Type

Ground, Garden, Groundcover

Plant Environment

Outdoor, Aquatic

Lifespan

Perennials

Plant Height

1-2.5 m

Spread

Indefinite, aggressive spreading

Growth Rate

Fast

Dormancy

Winter dormant

Leaf Color

Green, White, Cream

Leaf Type

Linear

Flower Size

Inflorescence 10-40 cm long

Optimal Sunlight Lux

75000

Weed Status

Yes

Image Gallery

Flowering & Fruiting Cycles

Monthly activity intensity for bloom and fruit across both hemispheres.

Northern hemisphere

Flowering & fruiting calendar

Peak bloom · JulPeak fruit · Aug
FloweringFruiting
02468JanFebMarAprMayJunJulAugSepOctNovDecActivity intensityMonths65
Southern hemisphere

Flowering & fruiting calendar

Peak bloom · SepPeak fruit · Oct
FloweringFruiting
02468JanFebMarAprMayJunJulAugSepOctNovDecActivity intensityMonths65
Synonyms
Baldingera arundinacea (L.) Dumort.
Baldingera colorata (Sibth.) G.Gaertn., B.Mey. & Scherb.
Calamagrostis colorata Sibth.
Digraphis arundinacea (L.) Trin.
Phalaridantha arundinacea (L.) St.-Lag.
Phalaris caesia Nees
Phalaris hispanica Coincy
Phalaris japonica Steud.
Phalaris monspeliensis Daveau
Phalaris picta (L.) Sloboda
Phalaris tuberinacea Coville & Ciald.
Phalaroides arundinacea (L.) Rauschert
Phalaroides caesia (Nees) Holub
Phalaroides hispanica (Coincy) Holub
Phalaroides japonica (Steud.) Czerep.
Phalaroides picta (L.) Prob.
Typhoides arundinacea (L.) Moench
Taxonomy
  • kingdomPlantae
  • divisionTracheophyta
  • classLiliopsida
  • orderPoales
  • familyPoaceae
  • genusPhalaris
  • speciesPhalaris arundinacea
Toxicity

Toxic for humans

No

Rating: 0/5

Toxic for pets

No

Rating: 0/5

Edible

No

Generally considered non-toxic to pets by ASPCA. Can accumulate nitrates in livestock under specific conditions, but not a direct toxic plant for humans or pets in ornamental settings.

Additional Care Tips

Ribbon Grass requires consistently moist to wet soil conditions to thrive, especially in warmer climates or during dry spells. It is highly tolerant of waterlogged areas and can even grow in shallow standing water, making it ideal for bog gardens or pond margins. Avoid letting the soil dry out completely.

Pruning Ribbon Grass is essential for maintaining its appearance and controlling its spread. In late winter or early spring, before new growth begins, cut all old foliage back to ground level. This encourages fresh, vibrant shoots. Deadheading spent flower stalks is crucial to prevent self-seeding, which is a major contributor to its invasive nature. Regular pruning helps manage its vigorous habit and keeps it tidy.

Ribbon Grass is remarkably easy to propagate, primarily through division of its extensive rhizomatous root system. The most effective times for division are in spring or autumn when the plant is not actively flowering. Simply dig up a clump, carefully separate sections that have healthy roots and at least one shoot, and replant them immediately. While it can grow from seed, division is more reliable, especially for maintaining specific variegated cultivars.

Due to its aggressive, spreading nature, Ribbon Grass is not commonly grown in pots. However, if containerized to restrict its growth, it will quickly become root-bound. Repotting or dividing the plant every 1-2 years is necessary. Choose a larger, sturdy container or divide the existing plant, discarding older, less vigorous sections. This practice helps maintain plant vigor and prevents the roots from cracking the pot.

FAQs

Is Ribbon Grass considered an invasive plant?

Yes, Ribbon Grass (Phalaris arundinacea) is highly invasive in many regions, particularly in wetlands and riparian areas. It spreads aggressively via rhizomes and self-seeding, often outcompeting native vegetation and forming dense monocultures.

How can I control the spread of Ribbon Grass in my garden?

To control its spread, plant Ribbon Grass in containers or use strong root barriers. Regularly deadhead flowers to prevent seed dispersal and cut back foliage in late winter or early spring. Consistent removal of new shoots and rhizomes is also effective.

What are the ideal growing conditions for Ribbon Grass?

Ribbon Grass thrives in full sun to partial shade and prefers consistently moist to wet soil. It is highly adaptable to various soil types, including clay, and can tolerate waterlogged conditions, making it suitable for bog gardens or pond margins.

Is Ribbon Grass safe for pets?

According to the ASPCA, Ribbon Grass (Phalaris arundinacea) is considered non-toxic to dogs, cats, and horses. However, some sources note that under specific conditions, it can accumulate nitrates which might be harmful to livestock if consumed in large quantities.

When is the best time to prune Ribbon Grass?

The best time to prune Ribbon Grass is in late winter or early spring, just before new growth begins. Cut back all the old foliage to ground level to encourage fresh, vibrant growth and maintain a tidy appearance throughout the growing season.