Atlantic Camas Camassia scilloides
Atlantic Camas is a perennial wildflower native to Canada and the lower 48 states. It grows to 2.5 ft and blooms Apr in full sun, with brown fruit.
More about this plant
Camassia scilloides is a perennial herb known commonly as Atlantic camas, wild hyacinth, and eastern camas. It is native to the eastern half of North America, including Ontario and the eastern United States. Wikipedia →
Growing & care
USDA PLANTS · TRY- Sun
- Full sun
- Soil & moisture
- Medium moisture
- Soil pH
- 4.2–6.5
- Fertility need
- Medium
- Adapts to
- Medium (loam), Fine (clay)
- Hardiness
- USDA zone 5+
- Height
- 2.5 ft
- Spacing
- 3–4 ft apart from USDA planting density
- Spread
- Slow
- Growth rate
- Moderate
- Growth form
- Single crown
- Lifespan
- Perennial · moderate
- Foliage
- Broadleaf · coarse texture
- Active growth
- Spring & summer
- Fruit
- Brown
- Flower colour
- Blue AI AI image-analysis of community-science photos (~87% expert agreement) — not a botanical record
- Propagate by
- Seed, Bulbs
- Seed starting
- Needs cold stratification a cold-moist spell before it germinates
- Seeds ripen
- Spring seed-collection / harvest window
- In the trade
- Routinely available
- Resprouts if cut
- No
Sow timing keys off your local last- and first-frost dates.
Wildlife & pollinators
How pollinator value is scored →✦ Bees 34 bee visitors
34 native & managed bee species are documented visiting Atlantic Camas — the 12 most-recorded:
Wildlife & visitors 3 nectaring
Open records of who else uses Atlantic Camas — a generalist food-web signal, kept separate from the keystone Ecological Value.
3 adult butterfly & moth species are recorded nectaring at its flowers:
Related plants
More Camassia →
How we know this (3) Methods & honest limits
A recorded categorical fact: each species is tagged C3 (standard), C4 (heat/water-efficient) or CAM (succulent, night-time CO₂ uptake) — or a facultative combination. We only show a trait card for the noteworthy C4/CAM cases; C3 is the unremarkable majority, kept in the data but not surfaced as a card.
We take the plant’s U.S. county range and look up each county’s long-term climate, then summarise: native rainfall = the median annual rainfall across its counties; heat tolerance = the warm end (90th percentile) of average temperature across its range (mirroring how our cold-hardiness floor uses an extreme). Counties + medians blunt the roadside/observer bias that makes point-level climate unreliable. Needs at least five placeable counties.
Honest limits: A realized, sampling-biased niche (where it has been recorded, not its physiological optimum), and county climate is coarse — large Western counties span deserts and mountains. Derived guide, never a measured fact.
McKenzie et al. assigned each species a flower colour with a GPT-4V vision model over iNaturalist photos. We use the confident tier plus a separately-labelled lower-confidence top-up (mostly inconspicuous green/brown flowers), and render it as a small tint — never as an asserted fact, and kept out of the written synopsis.
Honest limits: AI image inference (~87% expert agreement on the confident tier); a decorative, confidence-tiered indicator, not a measured trait.
Sources for this entry (32) Open & cited
Cite this page Open data, please attribute
PlantKey’s data is open under CC BY-SA 4.0 — free to reuse and adapt, with attribution and the same licence. Photos keep their own per-image licence + credit (see Sources above).
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