Prostrate amaranth
Amaranthus deflexus · Amaranthaceae
The gardener's calendar
Ideal time to plant prostrate amaranth: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous, olive green to reddish
- Flowering
- Summer to autumn (July-November)
- Adult size
- 20-60 cm in height, spreading to trailing habit
- Growth
- Fast
- Hardiness
- Non-hardy, annual or frost-sensitive
- Origin
- Tropical and subtropical regions
- Soil type
- Well-draining soil, low maintenance
- Exposure
- Full sun to partial shade
Care
Watering
Water regularly without letting the soil dry out completely, but avoid excess moisture that promotes root rot. In hot summer, increase frequency. Gradually reduce watering as autumn approaches.
Exposure
Place the prostrate amaranth in full sun for optimal growth and beautiful foliage coloration. It tolerates partial shade but will be less vigorous. Protect it from strong winds that can damage its delicate habit.
Soil
Ordinary, well-draining soil that's slightly rich is sufficient. Prostrate amaranth adapts to most substrates. Improve poor soils with a little compost when transplanting or in pots.
Fertilizing
Apply balanced diluted fertilizer every 3-4 weeks during active growth. Moderate feeding is enough; excess nitrogen promotes foliage at the expense of flowering.
Pruning and maintenance
Pinch young stems to encourage bushier and more branched growth. Remove spent flowers to extend the flowering period. Remove any diseased or damaged foliage.
Diseases and pests
Watch for powdery mildew and root rot if moisture is excessive. Ensure good air circulation around the plant and avoid overhead watering. Aphids may occasionally colonize it; treat with soapy water if needed.
Did you know?
Prostrate amaranth is a cosmopolitan plant that has become an adventive species (unwanted weed) in many regions of the world. Its invasive success stems from its ability to reproduce quickly and adapt to various climates, making it a plant extensively studied in ecology and agronomy to understand the dynamics of plant colonization.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
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Tips generated and checked by Viridia — adapt them to your local climate.