Annual Marshelder (Iva annua)

Common names:
Give a thumbs up Marsh-Elder
Give a thumbs up Annual Marshelder
Give a thumbs up Sumpweed

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Annual
Sun Requirements: Full Sun
Water Preferences: Wet
Wet Mesic
Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Plant Height: 2 to 5 feet
Leaves: Malodorous
Fruit: Other: Small, brown to black slightly flattened achenes
Fruiting Time: Fall
Flower Color: Green
Other: Maturing to red, to brown
Bloom Size: Under 1"
Flower Time: Summer
Late summer or early fall
Underground structures: Taproot
Resistances: Humidity tolerant
Salt tolerant
Pollinators: Wind

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Discussion Threads about this plant
Thread Title Last Reply Replies
Plant identification by BethP Jul 29, 2019 7:47 PM 7
Annuals Week Article - Have Question by Marilyn Jan 18, 2014 7:44 PM 4

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