Sierra Manroot

Marah horridus

Native to:
United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Cucurbitaceae
Genus:
Marah (Kellogg | - m)
Species:
Marah horridus
USDA Symbol:
MAHO

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb , Vine
Height:
600 cm
Light Requirements:
Full Sun
Drought Tolerance:
High
Bloom Months:
feb,mar,apr,may
Bloom Colors:
white, cream

Wildlife Benefits

Bees:
★☆☆☆☆ Documented bee visitation (GBIF)

Garden & Ecology Notes

Wildlife Value:
bees, small mammals
Deer Resistant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouts vigorously from large tuberous root after fire or mechanical damage. Adapted to California chaparral fire regimes.

Soil Requirements

Soil Type:
rocky, well-drained, nutrient-poor soil
pH:
6.0 - 7.5 (slightly acidic to neutral)
Drainage:
excellent drainage required
Moisture:
dry to moderate
Notes:
native to arid regions, prefers dry conditions

Propagation & Germination

Stratification:
Cold/moist stratification required — 60–90 days
Scarification:
Seed coat scarification required before sowing
Germination Time:
14–60 days
Notes:
Large seeds benefit from scarification and cold stratification. Plant seeds 1-2 inches deep in fall for natural stratification.

The above propagation data sourced from Claude AI

Pre-treatment: Cold-moist stratification for 30 days at 1–5°C (34–41°F).; then Cold-moist stratification for 60 days.

Source: Claude AI