Freesia 'Delta River'

RHS Plant Profile
freesia 'Delta River'

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Grown from corms, this perennial, up to 50cm tall, has linear, mid-green leaves arranged in a fan. Arching sprays of fragrant, purple, funnel-shaped flowers are produced in spring or summer

Position

Full sun

Soil Types

Chalk, Loam, Sand, Clay

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1 year
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Chalk Loam Sand Clay
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
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
Iridaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Clump forming
Genus
Freesia are cormous deciduous perennials with erect, linear to narrowly lance-shaped leaves and upright stems bearing terminal racemes of slender-tubed, salver-shaped or trumpet-shaped flowers that are usually scented
Name Status
Accepted

How to Grow

Cultivation

Freesias naturally flower in early spring, but need frost-free conditions. Plant corms in autumn, outdoors in very mild areas, or in containers in a frost-free greenhouse. Specially prepared corms can be planted outdoors in mid-spring to flower in late summer, but will only do this for the first year. See freesia cultivation

Propagation

Propagate by separating corm offsets, or by seed. Young plants take a few seasons to reach flowering size. See freesia cultivation

Suggested planting locations and garden types

  • City and courtyard gardens
  • Coastal
  • Cottage and informal garden
  • Patio and container plants
  • Gravel garden
  • Mediterranean climate plants
  • Conservatory and greenhouse
  • Cut flowers
  • Flower borders and beds
  • Wall side borders

Pruning

No pruning required

Pests

May be susceptible to glasshouse red spider mite

Diseases

May be susceptible to dry rot and Fusarium wilt