Glandularia Seabrook's Lavender ('Sealav'PBR)

RHS Plant Profile
vervain [Seabrook's Lavender]

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Synonyms

Glandularia 'Sealav'PBR
Verbena 'Sealav'
Verbena Seabrook's Lavender

Bedding Herbaceous Perennial
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A spreading half-hardy perennial, to 40cm tall, with ovate leaves to 5cm long. Rounded clusters of small, fragrant lavender-coloured flowers, with a darker eye, are borne in summer

Position

Full sun

Soil Types

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

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

Position

Full sun
Aspect
South–facing or East–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)
H3

Colour & Scent

Fragrance Flower
Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Verbenaceae
Native to GB/Ireland
No
Foliage
Semi evergreen
Habit
Trailing
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
Trade

How to Grow

Cultivation

In borders, plant in well-drained soil and full sun. In containers best grown in peat-free compost with added sharp sand.

Propagation

Propagate by semi-ripe cuttings

Suggested planting locations and garden types

  • Patio and container plants
  • Cottage and informal garden
  • Low Maintenance
  • Garden edging

Pruning

Deadhead regularly to promote flowering

Pests

May be susceptible to aphids

Diseases

May be susceptible to powdery mildews