Tuberous grasspink (Calopogon tuberosus)

Also known as: Simpson's grasspink

The Pink Lady's Slipper (Cypripedium acaule) is an orchid species native to eastern Canada, the United States, and the Caribbean. It is particularly favored by bumblebee pollinators. However, its distinctive slipper-shaped flower restricts access, allowing only specific pollinators to navigate its structure for effective pollination.

In This Article

Care Tips Water Sunlight Temperature Soil Fertilize Prune Propagation Repotting

Attributes of Tuberous grasspink

Lifespan

Perennial

Plant Type

Herb

Plant Height

20 cm to 53 cm

Spread

30 cm to 60 cm

Leaf Color

Green

Flower Size

2.5 cm to 5 cm

Flower Color

White Pink Purple Red

Images of Tuberous grasspink

Quickly Identify Tuberous grasspink

To identify Calopogon tuberosus, look for its grass-like leaves and tuberous roots. The flowers are unique with pink or occasionally white petals and a distinctive bearded lip that has yellow, white, and magenta hairs. The flowers grow in a loose, spike-like arrangement on tall, slender stems.

Scientific Classification of Tuberous grasspink

Phylum

Vascular plants

Class

Monocotyledons

Order

Asparagales

Family

Orchid

Genus

Grass pink

Species

Tuberous grasspink

Planting and Growing of Tuberous grasspink

Care Difficulty

Hard

Watering Schedule

Every 4 days

Sunlight Requirements

Full sun

Sunshine Duration

6-10 hours

Ideal Temperature

65-75℉

Soil Type

Potting Mix, Peat Mix

Soil pH

4-6.8

Fertilizer Type

Balanced

Pruning Season

Spring, Summer

Pruning Area

Branches, Leaves

Pruning Frequency

Once a year

Repotting Season

Spring

Pot Type

Plastic, Ceramic

How to Water Tuberous grasspink?

Calopogon tuberosus prefers evenly moist soil, but it should not be soggy. Aim to water with around 250 ml each time. Water enough to keep the soil consistently moist but never waterlogged. It's important to maintain a balance to support the health of the plant.

What are the symptoms of an underwatered Tuberous grasspink? ›

What should I do if my Tuberous grasspink is not getting enough water? ›

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How to save an overwatered Tuberous grasspink? ›

What Are the Sunlight Requirements for Tuberous grasspink?

Sunlight Requirements: Full sun, Partial sun

Duration of light: 4-8 hours daily

Calopogon tuberosus ideally requires full sun to partial sun. Adequate light ensures rich flowering and enhances the vibrancy of its blooms. This range supports steady growth and prevents both scorching and etiolation.

What is the best lighting condition for Calopogon tuberosus? ›

How can I achieve ideal lighting for this plant? ›

What are the benefits of ideal lighting conditions? ›

More About Sunlight Requirements Techniques→

What Is the Ideal Temperature Range for Tuberous grasspink?

Ideal Temperature: 65 ~ 75℉

The ideal temperature range for Calopogon tuberosus, commonly known as the grass-pink orchid, is between 65°F and 75°F. Within this range, the orchid can thrive, achieving optimal growth and blooming. This temperature range allows the plant to perform crucial physiological processes such as photosynthesis and nutrient absorption efficiently. It is essential to maintain consistent temperatures within this range to avoid stress on the plant.

What Soil is Best for Tuberous grasspink?

Soil type: Peat soil, Acidic soil, Sandy soil

Soil PH: 4 ~ 6.8

Calopogon tuberosus thrives in soil that retains moisture without becoming waterlogged. This ensures the plant has constant access to water, stimulating robust growth and vibrant blooms while preventing root rot. The plant demands a nutrient-rich substrate that supports its tuberous roots. A well-fed soil promotes health, enhances flower production, and sustains prolonged growth cycles. Proper aeration in the soil allows Calopogon tuberosus to exchange gases efficiently, ensuring its roots receive enough oxygen. This prevents fungal infections and keeps the plant vigorous.

How to Fertilize Tuberous grasspink?

Fertilizer type: Balanced

For Calopogon tuberosus, it's essential to use a moderate amount of fertilizer since over-fertilization can be detrimental. A balanced 10-10-10 liquid fertilizer should be diluted to one-quarter of the recommended strength. When using granular fertilizer, apply approximately one tablespoon per square foot.

How to Prune Tuberous grasspink?

Pruning Time: Spring

Begin by inspecting the plant and carefully cutting away any dead, wilted, or discolored foliage. This practice ensures that all remaining healthy parts can thrive without being weighed down by non-productive growth. Prune gently around the plant to maintain a natural shape. Avoid cutting too aggressively or too deep into the base of the stems, which might stress the plant. More About Pruning Techniques→

How to Propagate Tuberous grasspink plant?

Propagate Time: Spring, Early summer

Collect seeds from mature pods of Calopogon tuberosus in late summer or early autumn. Store them in a cool, dry place until ready for sowing in early spring.

During the spring, carefully lift the entire plant and separate the tubers using a sharp garden knife. Each section should have a growth point or eye to ensure successful sprouting.

Sow seeds on the surface of a fine, sterilized growing medium. Lightly cover with a thin layer of substrate, as Calopogon tuberosus seeds require light to germinate.

More About Propagating Techniques→

How to Repot Tuberous grasspink plant?

Repotting frequency: Every 2 years

Calopogon tuberosus should be repotted when you notice overcrowding. If you see bulb congestion or roots spilling over, it signals a need for more space. Repotting ensures the plant has ample room to grow and remain healthy.

Select a pot slightly larger than the current one to allow growth. Ensure the pot has proper drainage holes to avoid waterlogging, which can lead to root rot. A breathable material like terracotta can help regulate moisture levels, benefiting the plant’s health.

Opt for a moist, airy orchid mix to ensure proper drainage while maintaining essential moisture levels. This soil prevents root suffocation and encourages robust root development, critical for Calopogon tuberosus vitality.