Richweed
Collinsonia canadensis
Also known as: Deepwoods Horsebalm
- Native to:
- Canada, United States
iNaturalist: © kkucera (iNaturalist #102171920)
Taxonomy
- Division:
- Magnoliophyta | - Flowering plants
- Family:
- Lamiaceae
- Genus:
- Collinsonia
- Species:
- Collinsonia canadensis
- USDA Symbol:
- COCA4
Growth Characteristics
- Life Cycle:
- Perennial
- Growth Habit:
- Forb/herb
- Height:
- 120 cm
- Light Requirements:
- Part Shade
- Drought Tolerance:
- Low
- Bloom Months:
- jul,aug,sep
- Bloom Colors:
- yellow
Wildlife Benefits
- Bees:
- ★☆☆☆☆ Documented bee visitation (GBIF)
- Caterpillars:
- ★☆☆☆☆ Recorded caterpillar host plant (HOSTS Database)
Keystone Species Ranking
- Caterpillar Keystone:
- ★☆☆☆☆ Butterfly & moth species supported by this genus (NWF)
Host Plant for Caterpillars
Erythroecia hebardi, Papaipema duplicatus, stalk borer moth (Papaipema nebris), the astute borer (Papaipema astuta), Holly Blue (Celastrina argiolus)
Reported Fauna Sightings
Bees: Common eastern (Bombus impatiens) Moths:Papaipema duplicatus, the astute borer (Papaipema astuta)
Garden & Ecology Notes
- Wildlife Value:
- bees, bumblebees
- Deer Resistant:
- Yes
- Fragrant:
- Yes
Soil Requirements
- Soil Type:
- rich, well-drained loamy soil
- pH:
- 5.5 - 7.0 (slightly acidic to neutral)
- Drainage:
- tolerates poor drainage
- Moisture:
- consistently moist
- Notes:
- prefers shaded woodland environments
Propagation & Germination
- Stratification:
- Cold/moist stratification required — 60–90 days
- Germination Time:
- 14–42 days
- Notes:
- Seeds require cold stratification. Germination can be erratic.
The above propagation data sourced from Claude AI
Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).
Source: Claude AI