Eustoma grandiflorum

RHS Plant Profile
blue field daisy

Other common names

lisianthius, lisianthus, prairie gentian, Texas bluebell

Synonyms

Lisianthius russelianus
Eustoma russellianum

Annual Biennial

A single-stemmed or branching annual or biennial to 70cm tall, with slightly fleshy, glaucous, grey-green leaves. In summer, broadly bell-shaped, satin-textured, pale purple flowers, to 5cm across, are produced on long stalks, either singly or in clusters, from the upper leaf axils. In frost-prone areas grow as flowering container plant in a temperate greenhouse. An excellent cut flower

Position

Full sun

Soil Types

Loam

Max Height

0.5-1 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1–2 years
Max Spread
0.1-0.5 metres
Max Height
0.5-1 metres

Growing Conditions

Loam
Moisture
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
H1C

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Gentianaceae
Native to GB/Ireland
No
Foliage
Evergreen
Habit
Columnar upright
Genus
Name Status
Unresolved
Plant Range
USA (Nebraska, Colorado, Kansas, Texas)

How to Grow

Cultivation

Under glass, grow in peat-free, loam-based potting compost in full light, with bright filtered light when in bloom. Ventilate well. When in growth, water freely and apply a balanced liquid fertiliser every 2-3 weeks; water sparingly in winter. Support stems

Propagation

Propagate by sowing seed at 13-16°C in autumn or late winter

Suggested planting locations and garden types

  • Patio and container plants
  • Conservatory and greenhouse
  • Cut flowers

Pruning

No pruning required

Pests

Generally pest-free

Diseases

May be susceptible to grey moulds