Annual Marsh Elder
Iva annua
- Native to:
- Mexico, United States
NRCS National Wetland Team, Fort Worth, TX.
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Iva
- Species:
- Iva annua
- USDA Symbol:
- IVAN2
Growth Characteristics
- Life Cycle:
- Annual
- Growth Habit:
- Forb/herb
- Height:
- 200 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- jul,aug,sep,oct
- Bloom Colors:
- green
Wildlife Benefits
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Host Plant for Caterpillars
Slender Flower Moth (Schinia gracilenta)
Reported Fauna Sightings
Moths:Slender Flower Moth (Schinia gracilenta)
Garden & Ecology Notes
- Wildlife Value:
- birds, small mammals
- Salt Tolerant:
- Yes
Soil Requirements
- Soil Type:
- rich, well-drained loamy soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- tolerates poor drainage
- Moisture:
- dry to moderate
- Notes:
- commonly found in disturbed areas
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 30–60 days
- Germination Time:
- 14–28 days
- Notes:
- Seeds germinate readily in spring after cold stratification. Light may improve germination rates.
The above propagation data sourced from Claude AI