Centaurea scabiosa

Greater Knapweed

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A hardy perennial in the Asteraceae family featuring deep lobed leaves and large purple or blue flower heads. Thrives in full sun, ideal for cottage gardens and wildflower meadows across temperate climates.
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info Pot sizes shown are estimations. Real dimensions may vary depending on the merchant.
Merchant Pot Size Availability Price
Amazon.com - Out of Stock $14.95 Buy
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Plant Details

Common Name Greater Knapweed
Family Asteraceae
Genus Centaurea
Species Scabiosa
Origin Southern Europe, North Africa, Western Asia
Blooming Summer flowering, large composite heads
Leaf Color Grey-green / Glaucous
Sunlight Sun
Category Outdoor plants
Pet Friendly check Yes
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Care & Maintenance

terrain
Soil

Well-drained, average to poor soil; tolerates chalk and clay

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Watering

Moderate during establishment; highly drought tolerant once mature

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Sunlight & Care

Requires full sun for best flowering performance and stem strength

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Fertilization

Low maintenance; apply compost annually in spring only if needed

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Pruning

Deadhead spent blooms to encourage reblooming; cut back dead foliage in late winter

Pest Control Aphid Leaf Miner Slug 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 5 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 12 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
-4° – 95°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
30% – 75%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
5000 – 60000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
1000 – 2500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
10% – 45%
% volumetric
Water content in the growing medium
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Soil EC
200 – 1500
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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