Senna, Argentine

Cassia corymbosa

$25.00

1 Gallon | Hardiness Zones 8-11

This upright shrub with small, dark green compound leaves has showy yellow flowers in September followed by cylindrical seed pods. More cold hardy than Cassia bicarpsularis and winter dormant in zone 8, it may freeze to ground in colder zones. This attractive fall flowering shrub is native to Argentina. Plant in sunny site with good soil.

Pickup available at Aiken Nursery

Usually ready in 2-4 days

PLANT DETAILS

Hardiness Zones: 8 - 11

Soil: Well-drained and Fertile

Sun: Full Sun

Seasonal Behavior: Deciduous

Growth Rate: Moderate

Height at Maturity: 6 - 10 Feet

Spread at Maturity: 4 - 6 Feet

Flower Structure: Produces large, showy, deep golden yellow flowers in clusters.

Blooming Season: Blooms from late summer to fall, often continuing until the first frost.

Color: The flowers are typically a deep golden yellow, creating a striking visual display against the green foliage.

Deep golden yellow, late summer, fall , winter

Light Requirements: Prefers full sun for optimal growth and abundant blooming. It can tolerate light shade but will flower less profusely.

Soil Requirements: Thrives in well-draining soil and is adaptable to various soil types, including sandy, loamy, and clay soils. It prefers slightly acidic to neutral pH (6.0-7.0). Incorporating organic matter such as compost can improve soil fertility and drainage.

Watering: Requires regular watering, especially during dry periods and the growing season. Keep the soil consistently moist but not waterlogged. Once established, it can tolerate some drought, but it performs best with consistent moisture.

Temperature and Humidity: Hardy in USDA zones 8-11. Prefers warm temperatures and moderate to high humidity. It is frost-sensitive, so in cooler climates, consider growing it as an annual or providing winter protection.

Fertilization: Apply a balanced, slow-release fertilizer in early spring to support healthy growth and flowering. An additional application of compost or well-rotted manure can enhance soil fertility.

Pruning: Prune after flowering to maintain shape and encourage bushier growth. Light pruning helps promote new growth and a tidier appearance. Remove dead or damaged branches as needed.

Pests and Problems: Generally pest-resistant but can occasionally attract aphids, scale insects, and spider mites. Ensure good air circulation and avoid overhead watering to prevent fungal diseases. If pests are detected, treat with insecticidal soap or neem oil.

Suitable Environment: Ideal for garden beds, borders, and as a specimen plant. Its bright yellow flowers and attractive foliage add a tropical feel to any landscape. It is also a magnet for butterflies, making it a great addition to butterfly gardens.

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