Senna corymbosa

RHS Plant Profile

flowery senna

Roy Cheek 2003

Synonyms

Cassia corymbosa Lam.

Shrubs Conservatory Greenhouse

Buy this from Plant Nurseries
6 Suppliers

A bushy evergreen shrub with pinnate leaves composed of lance-shaped leaflets, and corymbs of bright yellow flowers 2cm across borne in the leaf axils in late summer

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

1.5-2.5 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity: 10–20 years
Max Spread: 1.5-2.5 metres
Max Height: 1.5-2.5 metres

Growing Conditions

Chalk Clay Loam Sand

Moisture: Moist but well–drained or Well–drained
pH: Acid or Alkaline or Neutral

Position

Full sun

Aspect: South–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H1C

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Fabaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Bushy
Genus: Senna can be deciduous or evergreen shrubs , trees or perennials with pinnate leaves and terminal or axillary racemes, corymbs or panicles of usually yellow, bowl-shaped, 5-petalled flowers
Name Status: Correct
Plant Range: C Americas

How to Grow

Cultivation

Under glass grow in peat-free,loam-based compost, in full light with shade from hot sun and moderate humidity. Water freely in summer but keep just moist in winter. During growth apply a balanced liquid fertiliser monthly. Can be grown outdoors in moderately fertile, moist but well-drained soil in full sun in a sheltered frost-free area

Propagation

Propagate by seed, sown at 18-24°C in spring or strike semi-hardwood cuttings in summer with bottom heat

Suggested planting locations and garden types

City and courtyard gardens
Patio and container plants
Mediterranean climate plants
Architectural

Pruning

Pruning group 1. Plants grown under glass may need restrictive pruning in late winter

Pests

Generally pest-free

Diseases

Generally disease-free