Onionweed (Asphodelus fistulosus)

Onionweed

Also known as: Onion-leafed asphodel, Pink asphodel

Onionweed (Asphodelus fistulosus) is an annual plant that is considered an invasive weed in the United States. It will grow to about 69 cm tall. Blooms in summer with white to pale pink flowers that close each night. Fruit ripens in fall and produces six seeds per fruit. Multiplies by tuber roots.

Scientific classification

Species

Onionweed (Asphodelus fistulosus)

Instantly identify plants with a snap

Snap a photo for instant plant ID, gaining quick insights on disease prevention, treatment, toxicity, care, uses, and symbolism, etc.

Download the App for Free

Perennial, Annual

Lifespan

30 cm to 45 cm

Spread

2.5 cm

Flower Size

White, Red

Flower Color

Evergreen

Leaf type

20 - 38 ℃

Ideal Temperature

Images of Onionweed

Distribution of Onionweed

Distribution Map

Onionweed is native to the Mediterranean region and has spread to other parts of the world as an introduced species. This plant has established itself in varied climates on multiple continents, from temperate to subtropical zones. It is cultivated in some areas, which has contributed to its wider distribution beyond its original range.

Native

Cultivated

Invasive

Introduced

No species reported

Discover plant distribution and habitat

Gain insights into where plants thrive and how they adapt, helping you identify, cultivate, and protect them with essential information on habitats, distribution maps, and climate trends.

Download the App for Free

Habitat

Dry sandy or rocky places in fields, track-sides and uncultivated ground

Hemisphere Trend Curve

Northern

Sorthern

Culture

Symbolism

My regrets follow you to the grave.

Get quick plant knowledge with a snap

Snap a photo for instant plant identification and learn about its name, symbolism, interesting facts, uses, and more.

Download the App for Free

Care Guide for Onionweed

Every week

Water

Full sun

Sunlight

20 - 38 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Originating from arid regions, onionweed demonstrates impressive drought tolerance and thrives with minimal moisture, requiring weekly watering. Ideal for xeriscaping, it flourishes in well-draining soil to prevent root rot, making it suited for outdoor cultivation and resilient to periods of neglect.

Fertilize: Onionweed thrives with balanced nutrition from monthly NPK fertilizers during active growth, enhancing health and flower production. Over-fertilization can damage roots, so moderation is key. Reduce fertilization in winter and avoid sap contact during application; combine with regular watering for nutrient absorption.

Pruning: Onionweed features hollow stems and white flower clusters and benefits from timely pruning, best in early to late spring. Removing dead stems and spent blooms promotes healthy growth, improves airflow, and reduces disease risk, ensuring vibrant displays and preventing invasiveness.

Propagation: Onionweed can be propagated easily through cuttings from healthy parts. Use a sharp, sterilized tool for clean cuts, then insert into well-draining soil, maintaining moisture without waterlogging. Regularly monitor for pests and diseases during initial growth for strong establishment.

Get tips and tricks for your plants.

Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.

Download the App for Free