Pineland Horseweed
Laennecia schiedeana
- Native to:
- Costa Rica, Guatemala, Mexico, Panamá, United States
Patrick Alexander (www.flickr.com) from Las Cruces, NM






Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Asteraceae
- Genus:
- Laennecia
- Species:
- Laennecia schiedeana
- USDA Symbol:
- LASC3
Growth Characteristics
- Life Cycle:
- Annual
- Growth Habit:
- Forb/herb
- Height:
- 100 cm
- Light Requirements:
- Full Sun
- Drought Tolerance:
- Medium
- Bloom Months:
- jul,aug,sep,oct
- Bloom Colors:
- white, yellow
Garden & Ecology Notes
- Wildlife Value:
- birds
- Deer Resistant:
- Yes
- Fire Ecology:
- Fire adapted — tolerates or benefits from fire
- Fire Notes:
- Pioneer species that colonizes disturbed and burned areas; resprouts or reseeds readily after fire.
Soil Requirements
- Soil Type:
- well-drained, sandy or rocky soil
- pH:
- 6.0 - 7.5 (slightly acidic to neutral)
- Drainage:
- excellent drainage required
- Moisture:
- dry to moderate
- Notes:
- often found in disturbed areas
Propagation & Germination
- Stratification:
- None required
- Germination Time:
- 7–21 days
- Notes:
- Seeds germinate readily with light; surface sow and do not cover.
The above propagation data sourced from Claude AI