perennial

Large-flowered Barbara's Buttons

Marshallia grandiflora

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8

Water

Medium to wet

Humidity

Prefers moderate humidity

Lifespan

Perennial

Native To

Southeastern United States

Toxicity

No toxicity known.

The Story

Plant Bio

Herbaceous perennial with a basal rosette of lance-shaped leaves and tall, leafless stems topped with large, intricate flower heads. The flower heads have tubular disk florets and frilly ray-like florets, typically pale pink to white. This species is appreciated for its long-lasting floral display in summer and its ability to attract pollinators, making it a valuable addition to native and pollinator-friendly gardens.

Uses & Benefits:

Features large, showy white flowers that brighten perennial beds and attract pollinators.

Drought tolerant once established, requiring minimal watering.

Supports pollinator populations, including butterflies and bees.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds into moist soil in early spring.
Keep soil consistently moist during germination, about 2 weeks.
Transplant seedlings when they are strong, after 6 weeks.
Plant in well-drained loamy soil with full sun exposure.
Water regularly during dry periods for optimal growth.
Mulch around base to retain moisture and suppress weeds.

Pro Tip

Ensure good soil drainage and full sun for best flowering.

Keep It Thriving

Care Guide

Do

Water regularly, especially during dry spells 🌱
Deadhead spent flowers to encourage more blooms
Mulch to retain soil moisture

Don't

Avoid overwatering, which can cause root rot ❌
Do not disturb roots during peak flowering
Refrain from fertilizing excessively, as it may promote foliage over flowers

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Divide
Harvest
Mulch
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Perennial border with airy, white flowersWildflower meadow accent

Companion Plants

Echinacea Coreopsis Black-eyed Susan Liatris Goldenrod

Multiply

Propagation Methods

Good to Know

Common Questions

Large-flowered Barbara's Buttons questions

What zones can Large-flowered Barbara's Buttons grow in?

Large-flowered Barbara's Buttons is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Large-flowered Barbara's Buttons deer resistant?

Yes — Large-flowered Barbara's Buttons is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Large-flowered Barbara's Buttons bloom?

Large-flowered Barbara's Buttons typically blooms in late spring to early summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Large-flowered Barbara's Buttons need full sun?

Large-flowered Barbara's Buttons does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.