Spiny amaranth (Amaranthus spinosus)
Care, watering, light and tips for Spiny amaranth on Floravia.
Quick facts
- Family: Amaranthaceae
- Difficulty: Easy to care for
- Watering: every 4 days
- Light: Partial shade
- Temperature: 10–30 °C
- Toxicity: Toxic to pets
About Spiny amaranth
Amaranthus spinosus, commonly known as spiny amaranth or thorny amaranth, is an annual plant belonging to the Amaranthaceae family, characterized by its spiny stems and lanceolate leaves. Although often considered a weed, its young leaves are edible and nutritious in some cultures. Its robust appearance and rapid growth make it interesting for low-maintenance gardens or as forage in certain regions.
Native range
Tropical and subtropical Americas, including the southern United States, Mexico, Central America, and South America
Care tips
Spiny amaranth thrives in full sun, requiring at least 6 hours of direct sunlight per day for optimal growth. It is a drought-tolerant plant once established, so watering should be moderate, allowing the substrate to dry out between waterings; avoid waterlogging. It prefers well-drained soils, from sandy to clayey, and is not particularly demanding in terms of nutrients. A common mistake is underestimating its propagation capacity, which can lead to it becoming a weed if not controlled.
How to save a dying Spiny amaranth
- Warning signs
- Wilting or yellowing leaves, soft stems. May look thirsty or waterlogged.
- First aid
- Check drainage and soil moisture. If dry, water deeply; if waterlogged, improve drainage.
- What kills it
- Overwatering and poor drainage, or extreme drought. It's sensitive to both extremes.
- Can it be saved?
- Yes, if you act quickly to correct the water issue. It's a resilient plant.