We're offering you a 6, 12 or 24 Sweet William Plants for £3.99, saving you up to 73% off Thompson and Morgan's's price of £14.99 (correct as of 24.02.2026).

Add Colour and Fragrance to Your Garden Instantly

Dianthus barbatus, commonly known as Sweet William, is a classic flowering biennial cherished for its clusters of bright, fragrant blooms. The 'Sweet Mixed' variety offers an eye-catching palette of reds, pinks, whites, and purples—perfect for creating lively displays in beds, borders, or patio pots.

• Botanical Name: Dianthus barbatus 'Sweet Mixed'
• Type: Hardy biennial/perennial bedding plant
• Flowering Period: Early summer through late summer (typically June–August)
• Mature Height: Up to 45cm (18 inches)
• Fragrance: Notably sweet and strong—ideal for sensory gardens

Growing Guide

• Sun Requirements: Prefers full sun but tolerates partial shade
• Soil: Well-drained, fertile soil; neutral to slightly alkaline pH is best
• Sowing & Planting: Plant outdoors from spring onwards after the last frost. Space plants about 20cm apart for best results.
• Watering: Water regularly until established; avoid waterlogged conditions
• Feeding: Apply a balanced fertiliser during active growth to boost flowering.

Caring for Your Sweet William Plants

• Pest & Disease Resistance: Generally trouble-free but watch for slugs and aphids.
• Deadheading: Remove spent blooms to encourage further flowering.
• Overwintering: Mulch in colder regions if left in the ground over winter.
• Suits mixed borders, cottage gardens, and containers.

Design & Companion Planting Ideas

• Borders & Edging: Use as a vibrant edging plant along paths or garden beds.
• Cottage Gardens: Pair with foxgloves, delphiniums, or lavender for a classic look.
• Pots & Planters: Perfect for patio displays—combine with pansies or violas for extended colour.

FAQs

• When is the best time to plant Sweet William?
  The ideal time is spring after the last frost. You can also plant in autumn in milder regions.
• How quickly will they flower?
  'Sweet Mixed' blooms in the same season as planting—usually within weeks during warm weather.
• What soil do they prefer?
  A well-drained, fertile soil with neutral to slightly alkaline pH is ideal. Avoid heavy clay or waterlogged spots.