Thorny Amaranth
Amaranthus spinosus
Last reviewed: June 2026
Light
full sun
Water
medium
Size
12"–48" H × 6"–24" W
Bloom
Jul, Aug, Sep
Native to
NC
Pollinators
bees, beetles
Browse plants for this ecoregion
Thorny amaranth is a fast-growing annual wildflower with upright stems and small greenish flower spikes that bloom through summer and fall. This native plant has spiny stems and can self-seed readily in disturbed soils. It thrives in hot, sunny conditions with moderate water needs.
In an HOA neighborhood
Thorny Amaranth takes more care to keep looking intentional in a front yard. Maintenance level: high. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Sharp spines pose safety hazard
- Extremely weedy appearance
- Self-seeds aggressively
Wildlife value
The summer blooms attract bees and beetles for pollen and nectar. Seeds provide food for birds and small wildlife in fall.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does Thorny Amaranth fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.