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Canadian Glyceria

Name: Canadian Glyceria
Brand: Akène
SKU: AKE-SEMENCES
Price: 4.99 CAD
Availability: OutOfStock

Common name Rattlesnake Manna Grass

Latin name Glyceria canadensis

Quantity per packet Minimum 200 seeds

This native wetland grass improves the stability of saturated soils while supporting local biodiversity. It is an outstanding choice for ecological restoration and naturalized landscapes throughout Canada.

Product information

Product
identification

Common nameRattlesnake Manna Grass

Latin nameGlyceria canadensis

FamilyPoaceae

TypeNative grass

CyclePerennial

Quantity per packMinimum 200 seeds

Product
description

Rattlesnake Manna Grass (Glyceria canadensis) is a vigorous native perennial grass of wetlands, valued for its exceptional hardiness, graceful habit, and outstanding ecological importance. Growing 60 to 100 cm (24 to 39 in) tall with a spread of 60 to 120 cm (24 to 48 in), it forms dense clumps that bring texture, movement, and a natural appearance to rain gardens, riparian landscapes, and wetland plantings. From July through September, its airy greenish-yellow panicles sway gracefully in the breeze, adding soft movement and seasonal interest to periodically flooded areas. Hardy to USDA Zone 3, this adaptable native grass is an excellent choice for naturalization projects throughout Canada.

Rattlesnake Manna Grass grows best in full sun to partial shade in organically rich, consistently moist to wet loamy or clay soils. Surface sow Glyceria canadensis seeds in spring or autumn on a moist growing medium. Germination typically occurs within 7 to 14 days at temperatures between 15 and 20°C (59 to 68°F). Consistent moisture is essential during establishment, after which this native grass tolerates temporary flooding exceptionally well. A light application of compost in spring is sufficient in poorer soils, and once established, only minimal maintenance is required aside from removing old stems before new growth begins.

Ideal for riparian buffers, rain gardens, naturalized shorelines, and wetland restoration projects, Rattlesnake Manna Grass helps stabilize saturated soils and reduce erosion through its dense root system. It pairs beautifully with Northern Blue Flag Iris, Cardinal Flower, Spotted Joe-Pye Weed, and Water Avens to create lush, biodiverse wetland plantings. Its dense foliage provides valuable shelter for small wildlife, wetland birds, and beneficial insects. Combining ornamental beauty, ecological function, and exceptional adaptability, Glyceria canadensis is one of the finest native grasses for wetland restoration and sustainable landscapes throughout Canada.

Sowing
guide

Sowing periodAutumn or spring

Best time

Spring after the last frost

Sowing depthSurface sow

Spacing / density

45 to 60 cm (18 to 24 in)

Germination temperature15 to 20 °C (59 to 68 °F)

Germination time7 to 14 days

Propagation

Propagate by seed.

Growing
method

Surface sow Rattlesnake Manna Grass seeds in autumn or spring on a consistently moist growing medium. Germination is typically rapid when the seeds remain in constant contact with moisture. This native grass thrives in organically rich loamy to clay soils and tolerates temporary flooding exceptionally well. Grow in full sun to partial shade and maintain moist soil throughout the growing season. Once established, it stabilizes wet soils, improves shoreline habitats, and is one of the best native grasses for ecological restoration projects throughout Canada.

Soil
and care

ExposureFull sun to partial shade

Soil

Organically rich loamy to clay soil that remains moist to waterlogged. This species thrives in wet soils and tolerates temporary flooding.

Soil pH5.5 to 7.5

Watering

Keep the soil consistently moist to wet throughout the growing season. This species readily tolerates temporary flooding.

Fertilization

A light application of compost in spring is sufficient. Rich organic soils generally provide all the nutrients this native grass requires.

Care levelModerate

In spring, remove the previous season's dry stems to encourage fresh growth. Maintain consistently moist soil throughout summer, particularly while young plants establish. Rich organic soils generally eliminate the need for additional fertilization. Leave some foliage standing through autumn to provide shelter for wildlife. A simple spring cleanup is usually all that is required.

Container
growing

Recommended pot size

30 to 45 cm (12 to 18 in)

Rattlesnake Manna Grass can be grown in a large container with excellent drainage and a generous water reservoir. Use an organic-rich growing medium and maintain constant moisture throughout the growing season. Although it performs best in the ground where its roots can spread through wet soils, container culture is suitable for rain gardens, water features, and ecological landscapes.

Bloom,
harvest
and garden

Its ability to colonize wet soils and reduce erosion makes it one of the finest native grasses for ecological restoration. Its dense foliage also provides valuable habitat for wetland wildlife.

Garden use

Rattlesnake Manna Grass is ideal for riparian buffers, rain gardens, wetland restoration, and naturalized shorelines. Its dense root system helps control erosion while improving habitat quality in wet environments. The lush foliage provides valuable shelter for birds, amphibians, and beneficial insects, making it an outstanding native grass for biodiversity-focused landscapes.

Bloom period

Graceful summer panicles appear from July through September, adding movement and texture to wetland landscapes.

Flower colorGreenish yellow

Foliage colorGreen

Harvest

August to September

Fruiting

Seed-rich decorative caryopses

Wildlife appealBeneficial wildlife

Size
and facts

Height60 to 100 cm (24 to 39 in)

Spread60 to 120 cm (24 to 48 in.)

Growth rateModerate

Hardiness zoneUSDA Zones 3–8

Minimum temperature-40°C (-40°F)

Foliage typeDeciduous

Papillonstrue

Insectes utilestrue

Planting
partners

Good companions

Northern Blue Flag Iris, Cardinal Flower, Spotted Joe-Pye Weed, Water Avens

Avoid planting with

Lavender, Cotton Lavender, Blanket Flower, Sedum

Recipe
and inspiration

The seeds were traditionally used as a wild grain in some northern regions after harvest and drying. Today, Rattlesnake Manna Grass is grown primarily for wetland restoration, shoreline stabilization, and its outstanding ecological value. Its dense foliage provides shelter for wildlife, making it an important species for biodiversity and habitat restoration.

Frequently asked questions

When should I sow Rattlesnake Manna Grass seeds? +

Rattlesnake Manna Grass seeds can be sown in spring or autumn on a consistently moist growing medium. Surface sowing ensures the seeds benefit from both light and moisture.

Does Rattlesnake Manna Grass grow in wet soils? +

Yes. It is naturally adapted to marshes, wet ditches, riparian buffers, rain gardens, and other wetland habitats.

Can Rattlesnake Manna Grass stabilize shorelines? +

Yes. Its dense root system effectively stabilizes shorelines and reduces erosion in wet soils.

Does Rattlesnake Manna Grass benefit wildlife? +

Yes. It provides food, shelter, and breeding habitat for numerous wetland birds, beneficial insects, and other wildlife.

How do you care for Rattlesnake Manna Grass? +

Very little maintenance is required. Simply remove the previous season's dry stems in spring and maintain adequate soil moisture during establishment.

The availability of our seeds varies depending on seasonal availability, production schedules and supplier inventory. Certain varieties may only be offered for a limited time based on their natural growth cycle, sowing period or available stock. These product pages are designed to help and inspire gardeners in choosing the right seeds for vegetable gardens, flower beds, pollinator gardens, container growing, naturalization projects and sustainable outdoor spaces.