Weakleaf bur ragweed (Ambrosia confertiflora)

Weakleaf bur ragweed

Also known as: Weakleaf burr ragweed, Slim-leaf bursage

The pollen of all ragweeds, including weakleaf bur ragweed, is a notorious allergen for humans, causing various allergic reactions. Although native to North America and Mexico, this plant has been naturalized in Australia and Israel. It is listed as a noxious weed in these countries. It prefers poor and dry soils, and grows abundantly along roads, highways, and city streets.

Scientific classification

Species

Weakleaf bur ragweed (Ambrosia confertiflora)

Asters bellflowers fanflowers and allies

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Perennial

Lifespan

Herb

Plant Type

Spring, Summer, Fall

Bloom Time

Yellow, Green

Flower Color

Deciduous

Leaf type

Images of Weakleaf bur ragweed

Distribution of Weakleaf bur ragweed

Distribution Map

Weakleaf bur ragweed is originally native to North America, particularly in regions with a temperate climate. It has been introduced and now thrives in parts of the Eastern Mediterranean Basin. This expansion of range demonstrates weakleaf bur ragweed's ability to adapt and establish itself beyond its traditional habitat, attesting to its robust nature as a species.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Desert, Upland

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Weakleaf bur ragweed

Every week

Water

Full sun

Sunlight

Water: Weakleaf bur ragweed thrives in arid conditions with low moisture needs, requiring watering only once a week. It is drought tolerant and efficient in low humidity but can suffer from root rot if overwatered, making careful irrigation crucial indoors.

Fertilize: For weakleaf bur ragweed, consistent monthly fertilization during the growing season enhances vigor. Use balanced fertilizers in moderation, tapering in cooler months to prevent root damage. Seasonal adjustments optimize nutrient intake. Adopting safety measures, like wearing gloves, is crucial for effective care of weakleaf bur ragweed.

Pruning: Prune weakleaf bur ragweed in early to late spring to promote healthy growth and fuller foliage. Trim dead or damaged branches above buds, ensuring sanitized tools are used. Regular pruning aids in managing vigorous growth, improving air circulation, and reducing pest risks and fungal issues.

Propagation: Weakleaf bur ragweed, from the Asteraceae family, thrives when propagated by sowing dry, disease-free seeds in well-draining soil. Maintain consistent moisture and ample sunlight to enhance germination. Careful attention during early seedling development fosters healthier growth and establishes a robust foundation for the plant.

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Learn More About Weakleaf bur ragweed

How to Transplant

How to Prune

How to Grow and Care

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