Cleome hassleriana

Spider Flower

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A vibrant annual known for spider-like flowers with long protruding stamens. Thrives in full sun, tolerating heat and drought once established; ideal for garden borders and cut flower arrangements.
yard Outdoor plants wb_sunny Sun pets Not pet-safe
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Plant Details

Common Name Spider Flower
Family Cleomaceae
Genus Cleome
Species Hassleriana
Origin South America
Blooming Annual, blooms profusely from summer to frost
Leaf Color Grey-green to medium green
Sunlight Sun
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Well-drained, sandy loam; tolerates poor soil and alkaline conditions

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Watering

Moderate watering initially, then drought tolerant. Allow soil to dry between waterings.

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Sunlight & Care

Requires full sun (6+ hours daily) for optimal blooming and stem strength

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Fertilization

Apply balanced fertilizer monthly during growth; avoid excess nitrogen to prevent leggy stems

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Pruning

Pinch tips early for bushiness; deadhead spent blooms to extend flowering season

Pest Control Aphid Flea Beetle Spider Mite Whitefly

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
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Growing Parameters

thermostat
Temperature
50° – 100°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
35% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
2000 – 50000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
5 – 30
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
20% – 65%
% volumetric
Water content in the growing medium
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Soil EC
400 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)
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