Lachenalia longituba

RHS Plant Profile

long-flowered Cape cowslip

Synonyms

Polyxena longituba

Bulbs Alpine Rockery

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A bulbous perennial to 5cm tall, with 2 narrowly lance-shaped, grooved leaves to 10cm long. In autumn it bears open, trumpet-shaped, sweetly scented mauve flowers to 2.5cm long; these close in cold weather

Position

Full sun

Soil Types

Loam, Sand

Max Height

Up to 10 cm

Max Spread

0-0.1 metre

Size

Time to Maturity: 2–5 years
Max Spread: 0-0.1 metre
Max Height: Up to 10 cm

Growing Conditions

Loam Sand

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

Position

Full sun

Aspect: East–facing or South–facing or West–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): H2

Colour & Scent

Fragrance Flower

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Asparagaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Tufted
Genus: Lachenalia are bulbous perennials with strap-shaped, sometimes dark-spotted leaves, and erect stems bearing racemes or spikes of tubular flowers, slightly fragrant in some species, in autumn, winter or early spring
Name Status: Correct
Plant Range: South Africa (Cape)

How to Grow

Cultivation

Grow outdoors in light well-drained soil in a sheltered, frost-free area. Grow under glass in a peat-free, loam-based compost in full light. Reduce watering as the leaves fade, then keep dry until fresh growth starts in autumn

Propagation

Propagate by sowing seed at 13-18°C as soon as ripe, or remove bulblets in summer or autumn

Suggested planting locations and garden types

Gravel garden
Patio and container plants
Rock garden
Conservatory and greenhouse

Pruning

No pruning required

Pests

Generally pest-free

Diseases

Generally disease-free