PlantsAmaranthus→Spiny Amaranth (Amaranthus spinosus)

Common names:
Give a thumbs up Spiny Amaranth
Give a thumbs up Thorny Pigweed
Give a thumbs up Edlebur
Give a thumbs up Needle Burr
Give a thumbs up Calaloo

Botanical names:
Amaranthus spinosus Accepted
Amaranthus caracasanus Synonym

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Annual
Sun Requirements: Full Sun
Water Preferences: Wet Mesic
Soil pH Preferences: Moderately acid (5.6 – 6.0)
Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Plant Height: 2 to 5 feet
Plant Spread: 2 to 3 feet
Fruiting Time: Late summer or early fall
Flowers: Inconspicuous
Flower Color: Green
Other: Greenish-yellow
Bloom Size: Under 1"
Flower Time: Summer
Late summer or early fall
Underground structures: Taproot
Uses: Will Naturalize
Resistances: Humidity tolerant
Drought tolerant
Propagation: Seeds: Self fertile
Pollinators: Self
Miscellaneous: With thorns/spines/prickles/teeth

author--Forest & Kim Starr

Photo gallery:

Discussion Threads about this plant
Thread Title Last Reply Replies
Plant identification by BethP Jul 29, 2019 7:47 PM 7
I know I know this plant... -- Amaranthus hybridus by starbookworm Oct 11, 2018 9:58 PM 6

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