Giant Ragweed (Ambrosia trifida) is a fast-growing annual herb with deeply lobed leaves. It is a major agricultural weed and a primary source of allergenic pollen, causin
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Sunlight
Full sun exposure is essential for vigorous growth.
Watering
Requires consistent moisture but tolerates some drought.
Soil
Prefers rich, moist, disturbed soils but tolerates a wide range.
Temperature
Thrives in warm temperate conditions.
Habitat
Outdoor
Fertilizer
No fertilization required; thrives in nutrient-rich soils.
Full sun exposure is essential for vigorous growth.
Requires consistent moisture but tolerates some drought.
Prefers rich, moist, disturbed soils but tolerates a wide range.
Thrives in warm temperate conditions.
Outdoor
No fertilization required; thrives in nutrient-rich soils.
Plant Type
Herb
Plant Category
Flowering
Plant Place Type
Ground
Plant Environment
Outdoor
Lifespan
Annuals
Plant Height
1-5 m
Spread
0.5-1.5 m
Growth Rate
Very fast
Dormancy
Winter
Leaf Color
Green
Leaf Type
Lobed
Flower Size
1-15 cm (inflorescence)
Optimal Sunlight Lux
60000
Weed Status
Yes
Toxic for humans
No
Rating: 0/5
Toxic for pets
Yes
Rating: 4/5
Edible
No
Pollen is a major allergen causing hay fever and asthma. Contact with foliage can cause dermatitis in sensitive individuals. Ingestion by pets can cause mild gastrointestinal upset.
