Ward's weed (Carrichtera annua)

Ward's weed

Ward's weed (Carrichtera annua) is a perennial herb with white or yellow flowers that can be found in grasslands, scrub, and chaparral habitats. It has become an environmental weed that reduces the productivity of pastures. The plant propagates by seeds which are covered in bristly hairs that attach to animal fur and clothing spreading the plant over long distances.

Scientific classification

Species

Ward's weed (Carrichtera annua)

Mustards, capers, and allies

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Annual

Lifespan

5 cm to 40 cm

Plant Height

8 mm to 1.2 cm

Flower Size

White, Yellow

Flower Color

Semi-evergreen

Leaf type

Distribution of Ward's weed

Distribution Map

Ward's weed is naturally distributed across the Mediterranean Basin and parts of the Middle East, where its presence is part of the indigenous flora. However, this plant has been introduced to regions on several continents including parts of Europe, Asia, and Oceania. In its introduced range, ward's weed has adapted to various environments, highlighting its resilience and ecological adaptability.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Rangelands, grasslands, open woodlands, pastures, disturbed sites, and waste areas in semi-arid regions.

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Ward's weed

Every week

Water

Full sun

Sunlight

Water: Ward's weed thrives in arid conditions, showcasing drought tolerance and preferring dry soil between weekly waterings. As an annual herb, ward's weed grows outdoors, ideal for xeriscaping due to its low water requirements, completing its life cycle rapidly.

Fertilize: Nourish ward's weed bi-monthly with balanced fertilizers during active growth, using high-nitrogen formulas sparingly. Apply in well-moistened soil without direct contact to avoid burn. Adjust for seasonal dormancy, ensuring even distribution to optimize health and appearance.

Pruning: Ward's weed is an annual herb with dense foliage and small yellow flowers. Prune in early to late spring by removing dead stems and thinning overcrowded areas to improve air circulation. Regular pruning promotes healthy growth and controls spread, ensuring optimal health and aesthetics.

Propagation: Ward's weed thrives when propagated by sowing seeds directly into prepared soil. Clear weeds and loosen soil for good seed contact. Use shallow drills for even distribution and keep the soil moist until germination. After germination, thin seedlings to prevent overcrowding and improve air circulation.

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Distribution of Ward's weed

Care Guide for Ward's weed

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