Amaranthus retroflexus

Redroot pigweed

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Annual herbaceous plant with red stems and rough foliage, native to North America. Can reach up to 2m tall with distinctive flower clusters. Edible in some cultures but often considered a weed.
yard Outdoor plants wb_sunny Sun pets Not pet-safe
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Plant Details

Common Name Redroot pigweed
Family Amaranthaceae
Genus Amaranthus
Species Retroflexus
Origin North America
Blooming Summer to autumn, produces dense flower clusters
Leaf Color green with reddish stems
Sunlight Sun
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Well-draining loamy soil, tolerates poor soils but thrives in nutrient-rich conditions

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Watering

Moderate watering during growing season, drought tolerant once established

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Sunlight & Care

Full sun exposure required for optimal growth and flowering

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Fertilization

Minimal fertilization needed, apply balanced fertilizer monthly during active growth phase

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Pruning

Remove spent flower heads to prevent self-seeding if control is desired

Pest Control Aphid Leaf Beetle

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

Growing Parameters

thermostat
Temperature
41° – 100°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
25% – 75%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
10000 – 35000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
2000 – 4500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
10% – 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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