We're offering you a 30 or 60 Dianthus Rocking Red Plants for £7.99, saving you up to 60% off Thompson and Morgan's's price of £19.99 (correct as of 24.02.2026).

Dianthus barbatus 'Rockin' Red': Hardy, Vibrant Perennial

Dianthus barbatus 'Rockin' Red', commonly known as Sweet William, is a robust perennial famed for its vivid, lacy red blooms. These upright plants create a dazzling display in borders, containers, or cottage gardens. Their compact growth habit (typically reaching 30–45cm tall) makes them perfect for adding structure and colour to any outdoor space.

• Breathtaking Blooms: The intense scarlet-red flowers appear in dense clusters from late spring into summer, attracting bees and butterflies.
• Scented Appeal: Each blossom carries a subtle, sweet fragrance—ideal for sensory gardens or cutting for indoor arrangements.
• Durable Performance: Hardy throughout the UK (RHS H5), these perennials tolerate a range of weather conditions and are reliably long-lived.

Growing Guide: Planting & Care Tips

• Planting Time: Pot on plug plants upon arrival, ideally between March and May after frost risk has passed.
• Location: Choose a sunny spot with well-drained soil; suitable for borders, raised beds, or patio containers.
• Soil Preference: Prefers neutral to slightly alkaline soil (pH 6.5–7.5). Avoid waterlogged sites.
• Irrigation: Water regularly during establishment; once mature, Dianthus tolerates short dry spells.
• Maintenance: Deadhead spent blooms to encourage further flowering. Trim back after flowering to maintain compact growth.
• Feeding: Apply a balanced fertiliser in early spring for best results.

Clever Garden Uses & Companions

• Create vibrant borders by pairing with Nepeta, Salvia, or Lavender.
• Add to cottage gardens alongside Foxgloves and Aquilegia for classic charm.
• Use in containers on patios or balconies for season-long colour and fragrance.

FAQs

• When is the best time to plant these Dianthus plug plants?
  The ideal planting window is early spring (March–May) once the risk of frost has passed.
• How tall do 'Rockin' Red' Dianthus typically grow?
  This variety reaches approximately 30–45cm (12–18 inches) in height at maturity.
• Do they need full sun?
  Dianthus thrives best in full sun but will tolerate partial shade if necessary.