Amaranthus albus
Amaranthus albus · Amaranthaceae
The gardener's calendar
Ideal time to plant amaranthus albus: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- Summer to fall (July-October)
- Adult size
- 0.3 to 1 m tall depending on conditions
- Growth
- Very fast
- Hardiness
- Not hardy, frost-sensitive annual
- Origin
- North America
- Soil type
- Well-drained, undemanding
- Exposure
- Full sun
Care
Exposure
White amaranth appreciates a full sun location for vigorous growth. It tolerates light partial shade, however. The more light it receives, the more robust its development will be and the more abundant its flowering.
Watering
Water regularly during the growing phase, especially in hot, dry weather. Let the soil dry slightly between waterings to avoid excess moisture. Once well established, this annual plant shows good tolerance to drought.
Soil
Well-drained, light soil suits white amaranth perfectly. It is undemanding and thrives in poor to average soil. Improve drainage if your soil is clayey or compacted.
Fertilizing
A moderate application of balanced fertilizer at planting time is sufficient. Avoid excess nitrogen, which would promote foliage at the expense of flowering. No additional fertilizing is generally necessary during the season.
Pruning and pinching
Pinching back young stems can encourage more compact, bushy branching. Remove spent flowers to prolong flowering. As an annual plant, white amaranth requires no structural pruning.
Diseases and pests
In overly humid conditions, watch for powdery mildew and root rot. Aphids may sometimes colonize young shoots: remove them with a simple water spray or gentle treatment. This plant is generally robust and trouble-free.
Did you know?
White amaranth is historically known as an early weed of North America, but it has also been traditionally used in various cultures for its edible seeds and nutritional properties. Its small, discreet white-green flowers contain thousands of tiny seeds that can remain viable in the soil for several years, ensuring its survival and natural dispersal.
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.