Does it need full sun?

It prefers partial shade but will tolerate full sun if the soil stays consistently moist.

How often should I water it?

Keep the soil constantly moist, as this plant naturally grows in wetlands.

Plant guide

Turtlehead.

Chelone glabra

Pronounced keh-LOH-nee GLAY-bruh

Also known as Balmony, Snakehead, Turtlehead, White Turtlehead, Smooth Balmony

white turtlehead — Photo by Carlos Domínguez-Rodríguez (CC BY) via iNaturalist

The turtlehead is a charming perennial that loves damp spots in your garden. It gets its name from the unique flowers that look just like a turtle's head poking out. It is a fantastic choice if you have a rain garden or a naturally wet area.

Another photo of Turtlehead — Photo by Jonathon Jongsma (CC0) via gbif

At a glance

Care level: Easy
Plant type: Perennial
Light: Full sun to partial shade
Indoor light: Bright indirect
Water: Every 2 to 4 days
Mature size: 2 to 3 feet
Growth rate: Medium
Hardiness: USDA 3 to 8
Bloom time: Late summer to mid autumn

Care

Keep the soil consistently moist because this plant hates drying out. Watch for wilting leaves as a sign that it needs more water immediately. You can pinch back the stems in spring to encourage a bushier shape.

Watering: Keep the soil evenly moist at all times.
Feeding: Apply a balanced organic compost in early spring.
Pruning: Cut the stems back to the ground after the first hard frost.
Repotting: Divide the clumps every few years to keep the plant vigorous.
Soil: Rich, moist, organic soil
Soil pH: 5.5 to 7.0
Temperature: -35 to 30°C
Humidity: 60 to 90%
Drought tolerance: Low
Lifespan: Perennial, typically 5 to 10 years
Deer and rabbits: Moderate

Signs it needs repotting

Roots growing out of the drainage holes
Stunted growth during the active season

Safety

People: There are no reports of significant toxicity in humans.
Children: The plant is not known to be a choking hazard or dangerous to handle.
Contact allergens: No specific skin irritation is associated with this plant.
Airborne allergens: There is no notable risk of airborne allergens from this species.
Edibility: This plant is not considered edible and should not be consumed.

How to identify it

Snapdragon like white or pink flowers
Flowers resemble a turtle head
Opposite lance shaped leaves
Sturdy upright square stems
Blooms in late summer to autumn

Height: 0.6 to 1.2m
Spread: 0.3 to 0.6m
Leaves: dark green, deciduous
Flowers: white, pale pink, 2 to 4cm
Fruit: brown, Autumn

Problems to watch for

Powdery MildewCommon
Slugs and SnailsCommon
AphidsUncommon
Leaf SpotUncommon
Root RotUncommon
RustUncommon

By symptom

Plant problems by symptom

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Growing it

Propagation: division, seed, cuttings
When to plant: spring, autumn
Overwintering: Cut the stems back to the ground after the first hard frost. Apply a layer of mulch if you live in an area with little snow cover.
In containers: It grows well in containers if you use a large pot and keep the soil constantly wet.

Division

Dig up the plant in early spring.
Separate the root clump into smaller sections.
Replant the sections immediately in moist soil.

Group this plant with other moisture loving perennials to create a self sustaining rain garden.

Grows well with

Joe Pye Weed · They share similar moisture requirements and bloom times.
Cardinal Flower · Both species thrive in the same wet, shady garden conditions.

Similar species

Pink Turtlehead · It is a closely related species with more vibrant pink flowers.

Science

Family: Plantaginaceae
Genus: Chelone
Order: Lamiales
Class: Magnoliopsida
Native range: Eastern North America.
Conservation: It is not currently listed as endangered or protected.

It grows in wet meadows and along stream banks where its roots can stay saturated.

Value to wildlife: larval host plant, nectar source
Pollinators: bees, butterflies
Uses: rain gardens, pollinator gardens, wetland restoration

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 1/9
Soil reaction: 5/9
Light: 5/9
Temperature: 5/9
Moisture: 8/9
Nutrients: 5/9

Taxonomy resolved against GBIF.

Questions people ask

Does it need full sun?: It prefers partial shade but will tolerate full sun if the soil stays consistently moist.
How often should I water it?: Keep the soil constantly moist, as this plant naturally grows in wetlands.

Where the name comes from

The genus name Chelone comes from the Greek word for tortoise, referring to the flower shape. The specific epithet glabra means smooth or hairless.

Good to know

It is the primary host plant for the Baltimore Checkerspot butterfly.
The flowers are designed to be opened only by strong insects like bumblebees.
It thrives in damp soil where other plants might struggle.

Keep your turtlehead growing

This page is a general guide. Save your plant in Pocket Botanist and you get care reminders timed for this plant, plus a care history that shows what worked.

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This guide was generated with AI on September 26, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.