Sweet William
Dianthus barbatus
📖 About this plant
A charming biennial or short-lived perennial producing dense clusters of fragrant, five-petaled flowers in shades of red, pink, white, purple, and bicolor patterns. Sweet William has been a cottage garden favorite for centuries, valued for its spicy clove-like fragrance and long-lasting cut flowers. It blooms in late spring and early summer, often overwintering as a rosette before sending up flowering stems in its second year.
🧑🌾 Care requirements
Full sun to partial shade (5-6 hrs)
Every 1-2 weeks
Moderate (40-60%)
10-24°C
Well-draining, slightly alkaline loam with organic matter; pH 6.5-7.5. Excellent drainage is essential
Light application of balanced fertilizer in early spring; side-dress with lime annually to maintain alkaline pH; avoid heavy feeding which produces floppy plants
🌐 Common Names
📋 Plant facts
- 🌍 Origin
- Southern Europe, Asia Minor, Mediterranean region
- 📏 Max height
- 30-60 cm
- 📐 Spread
- 20-45 cm
- 🕰️ Bloom time
- Spring - Summer
- 🎨 Bloom color
- Pink, Red, White
- 🍃 Foliage color
- Green
- ⏳ Lifespan
- Biennial
- 📈 Growth rate
- Moderate
- ☠️ Toxicity
- Non-toxic to humans and pets; all parts safe. Dianthus species are generally considered garden-safe
- 🌱 Propagation
- Sow seeds indoors 6-8 weeks before last frost; direct sow in late spring or early fall; stratify seeds at 4°C for 2 weeks before sowing; divide clumps every 2-3 years in spring
🛡️ Health & Safety
Non-toxic to humans and pets; all parts safe. Dianthus species are generally considered garden-safe
Common issues
- Crown rot in wet heavy soil
- Rust and fungal leaf spot
- Slugs on young rosettes
- Short lifespan (often treated as a biennial)
- Self-seeds freely — can become weedy in ideal conditions
💡 Care tips
- Clusters of fragrant bicolor flowers in pink red and white
- Biennial that blooms in its second year from seed
- Deadhead regularly to prolong the flowering season
- Excellent choice for cottage gardens and borders
