Veronicastrum virginicum

Culver's Root

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Tall herbaceous perennial native to North America, featuring whorled leaves and striking vertical white flower spikes blooming in summer.
yard Outdoor plants wb_sunny Shade / Half-shade pets Pet Friendly
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Plant Details

Common Name Culver's Root
Family Plantaginaceae
Genus Veronicastrum
Species Virginicum
Origin Eastern North America
Blooming Summer to early autumn
Leaf Color Green, grey-green
Sunlight Shade / Half-shade
Category Outdoor plants
Pet Friendly check Yes
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Care & Maintenance

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Soil

Moist, well-drained loam; tolerates clay and heavy soils. Prefers pH 6.0-7.5.

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Watering

Keep soil consistently moist during establishment; drought tolerant once mature. Reduce watering after flowering.

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Sunlight & Care

Full sun for best bloom density; tolerates partial shade in hot climates to prevent scorching.

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Fertilization

Apply compost or balanced slow-release fertilizer in spring. Avoid excess nitrogen which causes flopping.

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Pruning

Cut back flower stalks after blooming to encourage rebloom. Cut stems to ground level in late autumn.

Pest Control Aphid Japanese Beetle Leafhopper Powdery Mildew Fungus

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 4 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 9 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
14° – 95°
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 – 60000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
200 – 1800
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
25% – 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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