Veronica longifolia

Long-leaved speedwell

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A hardy herbaceous perennial native to Europe and Asia, featuring tall spikes of blue or violet flowers with narrow green leaves. Ideal for garden borders due to its vertical presence and pollinator appeal.
yard Outdoor plants wb_sunny Half-shade / Sun pets Pet Friendly
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Plant Details

Common Name Long-leaved speedwell
Family Plantaginaceae
Genus Veronica
Species Longifolia
Origin Europe/Asia Minor
Blooming Tall spikes of blue/purple flowers in summer
Leaf Color Bright green
Sunlight Half-shade / Sun
Category Outdoor plants
Pet Friendly check Yes
yard

Care & Maintenance

terrain
Soil

Moist, well-drained loam or clay soil; tolerates various textures but dislikes waterlogging.

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Watering

Regular watering during establishment; keep soil moist in summer droughts; reduce in winter dormancy.

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Sunlight & Care

Full sun to partial shade for optimal flowering and stem strength.

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Fertilization

Apply balanced slow-release fertilizer in spring before growth begins.

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Pruning

Deadhead spent flowers to encourage reblooming; cut back to ground level after flowering or late autumn.

Pest Control Aphid Slug Snail Thrip

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 3 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 8 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
5° – 90°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 80%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
3000 – 100000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
1200 – 3500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
20% – 70%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1500
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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