Wildflower Archive

woodland wildflower

Hairy sweet cicely

Osmorhiza claytonii

Also known as Clayton's Sweetroot, Hairy Sweet-cicely, Sweet Jarvil

Hairy sweet cicely (Osmorhiza claytonii)1 of 2
Osmoriza claytonii

Native to much of the USA and southern Canada

Quebec, south to Georgia mountains, northwestern Arkansas and eastern Kansas (more abundant northward)

  • Light Full shade Sun tolerance
  • Moisture Moist Moisture preference
  • Zones 3–8 Cold to heat range
  • Bloom Apr–Jun Flowering time
  • Height up to 3 ft to 0.9 m
  • Life cycle Perennial Annual to perennial
Full details, see below

In the garden

A woodland wildflower for full shade and evenly moist soil. Its white flowers peak in May. At up to 3 ft, it suits shade gardens and woodland edges. Hardy in USDA zones 3–8.

Growing conditions

Light
Full sun Partial shade Full shade
Moisture
Dry Moist Wet

Hardiness zones

Find your zone:

When it blooms

The Hairy sweet cicely's white flowers bloom April to June, peaking in May. This late-spring display draws bees.

Apr–JunJanFebMarAprMayJunJulAugSepOctNovDec

Hairy sweet cicely blooms whiteFoliage

Pollinators & wildlife

  • Bees Pure Green Sweat bee
    also Orange-legged Furrow Bee, Cresson's Mining Bee, Andrena personata +7 more Illinois Cuckoo Nomad Bee, Sphecodes townesi, Augochloropsis fulgida, Nomada parva, Nomada hydrophylli, Spring Beauty Miner, Nomada sayi

Full plant details

Where it grows

Habitat
WoodlandThe wild plant community it grows in.
Native range
Much of the USA and southern CanadaUnited States (33): AL, AR, CT, DC, DE, GA, IA, IL, IN, KS, KY, MA, MD, ME, MI, MN, MO, NC, ND, NE, NH, NJ, NY, OH, PA, RI, SC, SD, TN, VA, VT, WI, WV. Canada (6): MB, NB, NS, ON, PE, QC. Where it grows wild on its own, by state and province.
Native distribution
Quebec, south to Georgia mountains, northwestern Arkansas and eastern Kansas (more abundant northward)The same native range, usually more exact than the state list, and often noting where it has spread beyond it.

Growing conditions

Light
Full shadeHow much sun it takes, from full sun to full shade.
Moisture
MoistThe soil dampness it prefers, from dry to wet.
Hardiness zones
USDA 3–8 · Canadian 2–7The cold-to-heat climate range it survives.
Soil
Moist, rich soilsThe soils it grows in naturally.
Soil texture
Light to heavy (sandy to clay)The soil grade it prefers, from sand to clay.
Soil pH
Mildly acid to mildly alkalineThe acidity to alkalinity it tolerates (7 is neutral).

Growth & form

Height
up to 3 ft (to 0.9 m)Typical mature height.
Life cycle
PerennialWhether it lives a single season (annual), two (biennial), or returns for years (perennial).

Flowers, foliage & fruit

Type
WildflowerWhat kind of plant it is.
Bloom
Apr–JunWhen it flowers.
Flower color
WhiteThe bloom color, or colors.
Fruit/Seeds
Schizocarp; ripens May–JulThe seed or fruit it sets after flowering.
Toxicity
None knownWhether any part is poisonous to people or pets.