Ambrosia Trifida
Giant Ragweed
A very invasive, fast growing annual herb. It overcrowds crops, and grows faster than other plants, making it highly competitive. It is known as a noxious weed, and can be destructive to native and crop plants. It produces pollen that can cause breathing problems in susceptible people.n
Contributed by @brimbporter
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Full sun to partial shade
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Occasional watering
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Full Frost Hardy: 5F (-15°C)
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All soil conditions
Common name
Giant Ragweed
Latin name
Ambrosia Trifida
type
Annual
family
Asteraceae
ph
5.5 - 8.5 Acid - Neutral
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Light
Full sun to partial shade
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Frost
Full Frost Hardy: 5F (-15°C)
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Soil
All soil conditions
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Water
Occasional watering
Plant & bloom calendar
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Best time to plant
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When the plant will bloom
full grown dimensions
1.50 M
2.00 M
Ambrosia Trifida
A very invasive, fast growing annual herb. It overcrowds crops, and grows faster than other plants, making it highly competitive. It is known as a noxious weed, and can be destructive to native and crop plants. It produces pollen that can cause breathing problems in susceptible people.n
Flowering
From Mid Summer TO Late Summer
Spikes of small greenish flowers, that turn yellowish-green then brown, appear at the end of the stems in Summer, the male flowers producing the pollen that is easily carried on the wind, and can cause breathing problems in susceptible people. The pollen is usually released in late Summer or Autumn. Near the base of the central flowering spike, one or two small spikes may develop that are only half as long.
Planting
From Early Spring TO Mid Spring
This is an invasive plant that would not generally be wanted or planted. It is not fussy about the type of soil, but prefers full sun
sifupaula
brimbporter