Tuberous Grasspink

Calopogon tuberosus

Native to:
Bahamas, Canada, Cuba, Prince Edward I., United States

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Taxonomy

Division:
Magnoliophyta | - Flowering plants
Family:
Orchidaceae
Genus:
Calopogon
Species:
Calopogon tuberosus
USDA Symbol:
CATU5

Growth Characteristics

Life Cycle:
Perennial
Growth Habit:
Forb/herb
Height:
90 cm
Light Requirements:
Full Sun
Drought Tolerance:
Low
Bloom Months:
may,jun,jul,aug
Bloom Colors:
pink, magenta, purple, white

Wildlife Benefits

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

Garden & Ecology Notes

Wildlife Value:
bees, butterflies
Deer Resistant:
Yes
Fire Ecology:
Fire adapted — tolerates or benefits from fire
Fire Notes:
Resprouting orchid that benefits from periodic fire in wet prairie and bog habitats. Fire removes competing vegetation and thatch accumulation.

Soil Requirements

Soil Type:
wet, peaty, nutrient-poor soil
pH:
4.5 - 6.5 (acidic to slightly acidic)
Drainage:
poor drainage tolerated
Moisture:
consistently moist
Notes:
Commonly found in bogs and wet meadows

Propagation & Germination

Stratification:
Cold/moist stratification required — 60–90 days
Germination Time:
30–180 days
Notes:
Orchid seeds require mycorrhizal fungi for germination and establishment. Propagation from seed is extremely difficult without laboratory conditions.

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

ORGHPS Germination Guide: Collect the capsules in early Sept. before they split. Either sow in a dryish sphagnum bog or surface sterilize the capsule, remove the seed aseptically and sow thinly in a good culture medium. Some will germinate at 20°C, remainder germinate if put at 4°C for 2 months. Need bright light to grow. Alternatively, you can collect mature seed and sow in a sphagnum bog.

Source: Ontario Rock Garden & Hardy Plant Society