Rudbeckia hirta

Black-eyed Susan

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Herbaceous perennial with vibrant yellow daisy-like flowers and dark centers. Native to North America, thrives in full sun gardens.
yard Outdoor plants wb_sunny Sun pets Pet Friendly
info Pot sizes shown are estimations. Real dimensions may vary depending on the merchant.
Merchant Pot Size Availability Price
Amazon.com 2-3 in In Stock $24.00 Buy
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Plant Details

Common Name Black-eyed Susan
Family Asteraceae
Genus Rudbeckia
Species Hirta
Origin North America
Blooming Summer to Autumn
Leaf Color Medium green
Sunlight Sun
Category Outdoor plants
Pet Friendly check Yes
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Care & Maintenance

terrain
Soil

Well-drained loamy soil, tolerates poor soils but dislikes waterlogging

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Watering

Moderate watering during establishment; drought tolerant once mature. Allow soil to dry slightly 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

Low fertility needs; apply compost at planting or diluted fertilizer monthly during growth phase.

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Pruning

Deadhead spent blooms to prolong flowering; cut back stems after frost in autumn.

Pest Control Aphid Japanese Beetle Leafhopper Spider Mite

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 7 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
50° – 90°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
3000 – 50000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
5 – 40
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
30% – 65%
% volumetric
Water content in the growing medium
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Soil EC
400 – 2200
mS/cm
Electrical conductivity (nutrient concentration in soil water)
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Common Problems

Something wrong with your Rudbeckia hirta? Select a symptom to diagnose and fix the issue.

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