Field guide plate · click to zoom
Canada Thistle
Bloom confirmed nearby
Cirsium arvense
In the United States:
Invasive
· also called creeping thistle, field thistle, canada thistle
Listed as invasive. Check local regulations — several jurisdictions restrict planting.
Honeybees visit Canada thistle primarily for its abundant white pollen and moderate nectar supplies during the peak summer bloom in temperate regions. Flowers open successively over several weeks, providing a consistent foraging resource amid the plant's spiny foliage, which does not deter pollinators. As a rhizomatous perennial, it spreads vigorously and benefits from regular cutting or mowing to manage growth while preserving bloom patches for bees.
| Nectar | medium |
|---|---|
| Pollen | high |
| Bloom (US) | June–September |
| Duration | ~3 months |
| Type | Perennial |
| Sun | full |
Reported nearby
- Sep 23 — blooming now (2)
- Sep 17 — blooming now
- Sep 9 — blooming now (2)
- Sep 8 — blooming now
- Sep 5 — blooming now
- Aug 31 — blooming now
- Aug 30 — blooming now
- Aug 29 — blooming now
- Aug 28 — blooming now (2)
- Aug 26 — blooming now (2)
- Aug 24 — blooming now
- Aug 22 — blooming now
- Aug 20 — blooming now
- Aug 19 — blooming now
Sign in to report this plant blooming nearby.