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PlantSnap
Plant Care
Redroot pigweed
(Amaranthus retroflexus)
Also Known As
Redroot pigweed, Backward pigweed, Rough pigweed, Common amaranth
About This Plant
Amaranthus retroflexus is a summer annual broadleaf plant species that can grow up to 6 feet in height. It has a thick stem and large leaves that are green or reddish-green in color. The plant produces small green flowers that bloom in the summer and fall.
Plant Care Instructions
Outdoor Size Range
36-72 inches (91-183 cm)
Light Requirements
Amaranthus retroflexus prefers full sun but can tolerate partial shade. It needs at least 6 hours of direct sunlight per day.
Humidity Needs
Amaranthus retroflexus can tolerate a wide range of humidity levels.
Fertilizing Schedule
Amaranthus retroflexus doesn't require a lot of fertilizer. A balanced fertilizer can be applied once a month during the growing season.
Pruning Guidelines
No pruning is required for this plant species.
Common Pests and Diseases
Common pests for Amaranthus retroflexus include aphids, spider mites, and whiteflies. It can also be affected by fungal diseases like powdery mildew.
Indoor Size Range
Not applicable for indoor growing
Watering Schedule
Water the plant regularly to keep the soil moist. It can tolerate drought but will grow better with regular watering.
Temperature Range
The plant prefers warm temperatures between 65-85°F (18-29°C). It can tolerate higher temperatures but may suffer in extreme heat.
Growing Season
The growing season for Amaranthus retroflexus is from late spring to early fall.
Growing Difficulty Level
Amaranthus retroflexus is relatively easy to grow and care for.
USDA Hardiness Zones
Amaranthus retroflexus is not a perennial plant and does not have a USDA hardiness zone.
Did You Know?
Amaranthus retroflexus is considered a weed in many parts of the world, but its seeds are edible and can be used as a grain substitute.
