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Herbaceous Perennial

Glandularia corymbosa

corymb mock vervain

A spreading perennial with toothed, green leaves up to 6cm long and in summer clusters of star-shaped, pale purple flowers with dark purple bracts borne on short stems above the foliage

Synonyms

Verbena corymbosa

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Ultimate height

0.5–1 metres

Time to ultimate height

2–5 years

Ultimate spread

0.5–1 metres

Clay

Loam

Sand

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

Aspect

South–facing or West–facing or East–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)

Botanical details

Family: Verbenaceae
Native to GB / Ireland: No
Foliage: Semi evergreen
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: Correct

How to grow

Cultivation

Grow in moderately fertile, moist but well-drained soil in full sun or partial shade

Propagation

Propagate by seed in early spring or propagate by cuttings

Suggested planting locations and garden types

Cottage and informal garden
Patio and container plants
City and courtyard gardens
Low Maintenance
Flower borders and beds

Pruning

Deadhead regularly to promote flowering

Pests

May be susceptible to aphids and slugs

Diseases

May be susceptible to Powdery mildews

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