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For successful seedlings,
see the growing notes at the bottom of the page!
Wild senna (Senna hebecarpa) is a native perennial shrub that can grow up to 1.5 metres tall. It is recognized for its vibrant green, pinnately compound leaves, which add an interesting texture to landscape designs. In summer, this ornamental plant produces clusters of bright yellow flowers that create a striking contrast with its lush foliage. These flowers are not only visually striking but also attract a variety of pollinators. Wild senna is ideal for naturalistic gardens in Quebec, preferring well-drained soils but adapting to a range of conditions, including clay or sandy soils. While it thrives in full sun, it also tolerates light shade.
Ecological Roles
Wild senna plays a crucial ecological role by providing an abundant nectar source for local pollinators, such as bees and butterflies, during its summer bloom. It actively promotes biodiversity in Quebec by offering shelter and food for beneficial insects. Additionally, its adaptability to various soil types makes it useful for restoring degraded habitats or stabilizing soils in disturbed areas. Thus, wild senna is not only an ornamental asset in gardens but also helps support the health of local ecosystems.
Wild senna seeds require cold stratification to ensure germination. See the cultivation notes below for more details.
Akène cannot assume any responsibility for the use of plants for therapeutic purposes. Always seek advice from a professional before using a medicinal or edible plant.
Sowing and Growing
Technical Details
Seeds per packet: 25
Family: Fabaceae
Scientific name: Senna hebecarpa
Life cycle: Perennial
Hardiness zone: 4
Soil type: Silty to clayey
Soil moisture level: Medium
Soil - additional attributes: Well-drained
Light: Sun, partial shade
Blooming: July to August
Spacing: 60 cm
Height: 150 cm
Deer resistance: High
Stratification: 15 days
Scarification: Sanding and soaking
Germination time: 7 to 20 days
Sowing depth: 5 mm