Glandularia Quartz Series

RHS Plant Profile
vervain Quartz Series

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vervain Quartz Series RHS / Joanna Kossak
vervain Quartz Series RHS 1999

Synonyms

Verbena Quartz Series
Verbena 'Bunting'

Award of Garden Merit
Annual Biennial Bedding
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Quartz Series are compact annuals to 25cm, with ovate leaves and large domed clusters of flowers in shades of red, violet-blue, salmon and white, some with a white eye, in summer and autumn

Position

Full sun

Soil Types

Chalk, Clay, Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

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

Growing Conditions

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

Position

Full sun
Aspect
South–facing
Exposure
Exposed or 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

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Verbenaceae
Native to GB/Ireland
No
Foliage
Deciduous
Habit
Bushy
Genus
Glandularia are annuals or herbaceous perennials, native to The Americas and closely-related to Verbena (and included within Verbena until recently). Showy flowers typically have 5 petals and are held in rounded clusters in summer and autumn
Name Status
Accepted

How to Grow

Cultivation

Best grown in moist but well-drained soil in full sun.

Propagation

Propagate by seed or stem tip cuttings

Suggested planting locations and garden types

  • City and courtyard gardens
  • Cottage and informal garden
  • Patio and container plants
  • Garden edging
  • Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to slugs, leafhoppers and aphids

Diseases

Some resistance to powdery mildews