Can I grow this in a standard garden bed?

It is best suited for wildflower meadows or areas with native grasses as it needs a host plant to survive.

Does it need special soil?

It prefers well drained, nutrient poor soils typical of traditional meadows.

Plant guide

Red bartsia.

Odontites vernus

Pronounced oh-don-TIE-tees VER-nus

Also known as Red Bartsia

Red bartsia is a charming annual wildflower often found in meadows and along roadsides. It is a hemiparasitic plant that draws some nutrients from the roots of neighboring grasses. You will love its delicate spikes of pinkish purple flowers in summer.

Another photo of Red bartsia — Photo by anemoneprojectors (through the backlog) (CC BY-SA) via iNaturalist

At a glance

Care level: Moderate
Plant type: Annual wildflower
Light: Full sun
Indoor light: Direct sun
Water: Every 3 to 7 days
Mature size: 12 to 18 inches
Growth rate: Medium
Hardiness: USDA 4 to 8
Bloom time: Late spring to mid summer

Care

This plant thrives in open, sunny spots with well drained soil. Since it is hemiparasitic, it grows best when planted near host grasses. Watch for yellowing leaves which might indicate it needs a better host plant nearby.

Watering: Keep the soil consistently moist but never soggy.
Feeding: Fertilizer is generally not needed for this wildflower.
Pruning: Deadhead spent flowers if you want to prevent it from self seeding.
Repotting: As an annual, this plant completes its life cycle in one season and does not require repotting.
Soil: Loamy, well drained soil
Soil pH: Neutral to slightly alkaline
Temperature: -20 to 30°C
Humidity: 40 to 70%

Safety

People: The plant is not documented as highly toxic, but ingestion should be avoided due to potential unknown chemical constituents.
Children: Keep children away from the plant to prevent accidental ingestion of seeds or foliage.
Edibility: This plant is not considered edible and may contain compounds that cause digestive upset.

How to identify it

Small pink to purple flowers
Opposite lance shaped leaves
Hairy stems and foliage
Spiked flower clusters
Annual growth habit

Height: 0.1 to 0.4m
Spread: 0.05 to 0.15m
Leaves: green, deciduous
Flowers: pink, red, 0.5 to 1cm
Fruit: brown, late summer

Problems to watch for

Root competition · The plant requires specific host grasses to thrive and will fail if those hosts are absent.

By symptom

Plant problems by symptom

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Growing it

Propagation: seed
When to plant: spring

Always sow this plant alongside native meadow grasses to ensure it has the necessary root connections to establish.

Grows well with

Meadow Fescue · This grass serves as a suitable host for the hemiparasitic roots of the bartsia.
Sweet Vernal Grass · It grows well alongside this grass in traditional meadow settings.

Similar species

Odontites vulgaris · It is very similar in appearance but typically flowers later in the season.

Science

Family: Orobanchaceae
Genus: Odontites
Order: Lamiales
Class: Magnoliopsida
Native range: Europe and parts of Western Asia.
Conservation: It is declining in some parts of Europe due to habitat loss and changes in agricultural practices.

It acts as a hemiparasite on various grasses, which helps maintain plant diversity in meadows by reducing the vigor of dominant grass species.

Value to wildlife: nectar source, hemiparasitic ecological role
Pollinators: bees, butterflies
Uses: meadow restoration, wildlife gardens

Through the year

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Flowering

Fruiting

Foliage

Ecological indicators

Salinity: 1/9
Soil reaction: 6/9
Light: 7/9
Temperature: 5/9
Moisture: 5/9
Nutrients: 3/9

Taxonomy resolved against GBIF.

Questions people ask

Can I grow this in a standard garden bed?: It is best suited for wildflower meadows or areas with native grasses as it needs a host plant to survive.
Does it need special soil?: It prefers well drained, nutrient poor soils typical of traditional meadows.

Where the name comes from

The name vernus refers to its spring flowering habit, though it often extends into summer.

Good to know

It is commonly known as red bartsia.
The genus name Odontites comes from the Greek word for tooth, referring to the shape of the calyx.
It thrives in disturbed soils and traditional hay meadows.

Keep your red bartsia 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 October 19, 2026 and checked against GBIF taxonomy. It is general information, not horticultural or veterinary advice. Read about how we build these guides.