Veronica idahoensis (H)

Synonyms

Synthyris platycarpa

Herbaceous Perennial

A clump-forming, evergreen perennial with ovate to rounded leaves with toothed margins. Flowering stems to 35cm tall appear in spring bearing up to 35 loosely-clustered, bell-shaped, blue to purple flowers, each up to 1cm long

Position

Full sun, Partial shade

Soil Types

Sand, Loam, Chalk

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 2–5 years
Max Spread: 0.1-0.5 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Sand Loam Chalk

Moisture: Moist but well–drained or Well–drained
pH: Acid or Neutral

Position

Full sun Partial shade

Aspect: East–facing or North–facing or South–facing or West–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): H5
Drought Resistance: Yes

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Plantaginaceae
Native to GB/Ireland: No
Foliage: Evergreen
Habit: Clump forming
Genus: Veronica can be annuals, perennials or sub-shrubs with paired leaves and small flowers usually in terminal or axillary racemes or spikes
Name Status: Correct
Horticultural Group

Horticultural Classification Codes

Horticultural Classification Codes are often given to genera which have a large number of species or cultivars. They are used to categorise cultivated plants based on specific, shared characteristics such as shape, colour, size or flowering time, and can be displayed as letters or numbers

For example:
Dahlia ‘Sunset Kate (Sin) = Single flower
Rosa ‘Marigold’ (HT) = Hybrid Tea: This genus has changed from Hebe to Veronica
Plant Range: USA

How to Grow

Cultivation

Grow in moist but well-drained, acidic or neutral soil in full sun or partial shade

Propagation

Propagate by seed or by division

Suggested planting locations and garden types

Rock garden
Patio and container plants
Gravel garden
Flower borders and beds

Pruning

No pruning required

Pests

May be susceptible to aphids

Diseases

High Risk Host for Xylella fastidiosa. May be susceptible to downy mildews, fungal leaf spot, fungal rot, Phytophthora and sometimes honey fungus