Marsh Hedge Nettle

Stachys pilosa

Pollinator plant

Growing it

When	Flowers July to August; fruits August to September
Type	wildflower
Sun	Full sun, partial shade
Water	High, medium
Soil	pH 5.5–7
Hardiness	zone 3–6
Mature height	0.7 m
Mature spread	0.6 m
Spacing	0.4 m
Years to maturity	2
Bloom	Jul–Aug
Flower colour	Purple not verified, a genus-level estimate
In bloom	July August
Fruit	Aug–Sep
Native to	AB, SK

lance-shaped leaves about 8 cm long in opposite pairs

Where it has been recorded

BothSpecimensObservations

264 squares of about 28 km, each holding at least one record. A square is not a claim that the plant grows throughout it, and an unshaded square is unrecorded rather than empty. Darker squares hold more records, which follows roads and towns as much as it follows the plant. 36 herbarium specimens and 529 field observations this project may redraw. A filled dot is a pressed sheet somebody can re-examine; a hollow ring is a photograph identified by community agreement. Where the dots are dense is where people have looked, not where the plant is commonest, and empty ground is unsurveyed rather than unoccupied. How this map is made.

Which ecoregions the records fall in

Aspen Parkland central AB / SK: 299 records, high confidence
Boreal Transition central AB / SK: 101 records, high confidence
Mid-Boreal Uplands central AB / SK: 89 records, high confidence
Cypress Upland south AB / SK: 44 records, high confidence
Moist Mixed Grassland south AB / SK: 43 records, high confidence
Peace Lowland north AB: 33 records, high confidence
Mixed Grassland south AB / SK: 30 records, high confidence
Northern Continental Divide south AB: 30 records, high confidence
Fescue Grassland south AB: 27 records, high confidence
Western Alberta Upland central AB: 23 records, high confidence
Wabasca Lowland north AB: 10 records, medium confidence
Slave River Lowland north AB: 6 records, low confidence
Western Boreal central AB: 4 records, low confidence
Churchill River Upland north SK: 3 records, low confidence

These are counts of records collected somewhere in the region, which is the resolution of the evidence: the map above shows where inside it. A region with 3 records is not the same claim as one with three hundred, so the count travels with the region. A region missing from this list means nobody has recorded it there, which is not the same as the plant being absent. Records within 900 m of a border count for neither side, because the border is not drawn finely enough to say which one they are on. Source: GBIF occurrence search + PRESERVED_SPECIMEN pass, retrieved 2026-08-24. Boundaries digitised from the National Ecological Framework for Canada v2.2 (Ecological Stratification Working Group 1995), simplified to about 900 m for display: an outline is accurate to roughly a kilometre, not to the metre. How these counts are made.

See every observation, live and current, on GBIF or iNaturalist.

Documented animals

11 documented relationships.

pollen for

Calliopsis andreniformis Robertson 1929
Mordellistena ornata Robertson 1929
Orange-legged Furrow Bee Robertson 1929
Poecilognathus sulphureus Robertson 1929
Senotainia trilineata Robertson 1929
Spring Cellophane Bee Robertson 1929
Viceroy Robertson 1929

nectar for

American Bumble Bee Specimen records from www.bumblebeewatch.org
Brown-tailed Bumble Bee Specimen records from www.bumblebeewatch.org
Golden Northern Bumble Bee Specimen records from iNaturalist.org
Northern Amber Bumble Bee Specimen records from iNaturalist.org

Also worth knowing

Safety

Toxicity not assessed, absence of a warning is not a guarantee of safety

Edible parts

Tuber, shoots (cooked), leaves

Buying it

About $8–$16 per plant (estimate), usually from a native-plant nursery. Estimate (herb default); AB retail as of 2026

Where these numbers came from

Flower detail: not verified, a genus-level estimate