Maryland Senna

Senna marilandica

Native to:
United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Fabaceae
Genus:
Senna
Species:
Senna marilandica
USDA Symbol:
SEMA11

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb , Subshrub
Height:
180 cm
Light Requirements:
Full Sun
Drought Tolerance:
Medium
Bloom Months:
jul,aug,sep
Bloom Colors:
yellow

Wildlife Benefits

Bees:
★☆☆☆☆ Documented bee visitation (GBIF)
Butterflies & Moths:
★☆☆☆☆ Documented Lepidoptera association (GBIF)

Reported Fauna Sightings

Bees: American bumble (Bombus pensylvanicus), Common eastern (Bombus impatiens) Butterflies:Cloudless Sulphur (Phoebis sennae), Sleepy Orange (Eurema nicippe)

Garden & Ecology Notes

Wildlife Value:
bees, butterflies, birds
Deer Resistant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts vigorously from rootstock following fire; historically found in fire-maintained prairies and open woodlands.

Soil Requirements

Soil Type:
rich, well-drained loamy soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
Prefers open, sunny locations in native prairies

Propagation & Germination

Stratification:
Cold/moist stratification required — 60–90 days
Scarification:
Seed coat scarification required before sowing
Germination Time:
14–30 days
Notes:
Hard seed coat requires scarification (mechanical or hot water treatment) followed by cold stratification for best germination rates.

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

ORGHPS Germination Guide: Sow @ 4C for 3 weeks, then place @ 20C. Requires scarification. | Requires soaking 24-48 hrs; discard floaters.

Source: Ontario Rock Garden & Hardy Plant Society