perennial

Sweet William Heart Attack

Dianthus barbatus 'Heart Attack'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

12 inches

Width

8 inches

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Moderate

Humidity

Average household humidity

Lifespan

Perennial

Native To

Mediterranean region

Toxicity

Mildly toxic to pets if ingested, can cause gastrointestinal upset.

The Story

Plant Bio

Dianthus barbatus, commonly known as Sweet William, is a compact, bushy perennial with clove-scented, ruffled flowers in vibrant shades of red, pink, and white, arranged in dense clusters on upright stems. The 'Heart Attack' cultivar features striking, deep blood-red, nearly black, velvety flowers. It is known for its intense, solid coloration and compact growth habit.

Bloom Period:

EarlyLate

Uses & Benefits:

Provides vibrant, fragrant flowers that attract insects, enhancing garden biodiversity.

Drought tolerant and requires minimal watering once established.

Supports pollinators like bees and butterflies.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

Tuck seeds into well-draining soil in early spring
Water regularly to keep soil moist but not soggy
Fertilize with a balanced fertilizer monthly during growing season
Deadhead spent flowers to encourage more blooms
Divide clumps every 2-3 years in early spring
Mulch around plants to retain moisture

Pro Tip

Ensure good air circulation to prevent fungal diseases

Keep It Thriving

Care Guide

Do

Water deeply during dry spells 🌱
Prune after flowering to maintain shape
Apply balanced fertilizer monthly

Don't

Overwater to avoid root rot ❌
Neglect deadheading
Plant in poorly drained soil

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Fragrant border plantColorful rock garden accent

Companion Plants

Lavender Sedum Coreopsis Echinacea Salvia

Multiply

Propagation Methods

Good to Know

Common Questions

Sweet William Heart Attack questions

What zones can Sweet William Heart Attack grow in?

Sweet William Heart Attack is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Sweet William Heart Attack deer resistant?

Yes — Sweet William Heart Attack is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Sweet William Heart Attack bloom?

Sweet William Heart Attack typically blooms in late spring through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Sweet William Heart Attack need full sun?

Sweet William Heart Attack does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Sweet William Heart Attack drought tolerant?

Yes — once established (usually after the first full season), Sweet William Heart Attack handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.