We're offering you a Petunia Allegra Mixed Collection for £5.99, saving you up to 40% off Thompson and Morgan's's price of £9.99 (correct as of 16.04.2026).

Italian Cutting Petunias

Bring Mediterranean Flair to Your Garden with Petunia 'Allegra Mixed Collection'

The Petunia 'Allegra Mixed Collection' introduces the first fully double-flowered petunias, delivering a burst of colour and fullness rarely seen in annual bedding plants. As members of the Solanaceae family, these Italian-bred hybrids showcase dense, ruffled blooms that captivate in containers, borders, or as cut flowers indoors.

Why Choose the Allegra Collection?

• Spectacular Double Blooms: Each plant produces abundant, multi-layered flowers for a plush garden display.
• Unique Growth Habit: With adequate support, Allegra petunias can climb up trellises or spill over pots and baskets.
• Extended Colour Impact: Enjoy continuous flowering from late spring until the first frosts.
• Versatile Use: Excellent for patio containers, hanging baskets, window boxes, and as striking cut flowers indoors.

Growing Guide

• Sowing & Planting: Start seeds indoors from February to April. Transplant outdoors after the last frost when temperatures remain above 10°C.
• Sunlight: Prefers full sun (at least 6 hours daily) for best flowering performance.
• Soil: Grows best in fertile, well-drained soil with a neutral to slightly acidic pH (6.0–7.0).
• Watering: Keep soil evenly moist but not waterlogged; avoid overhead watering to reduce risk of fungal issues.
• Feeding: Apply a balanced liquid fertiliser every two weeks during active growth for maximum blooms.
• Pest & Disease: Watch for aphids and slugs; maintain good air circulation to prevent mildew.

Caring for Your Petunia 'Allegra'

• Potted Displays: Deadhead spent blooms regularly to encourage new flowers and prolong display.
• Trellising: For climbing habit, provide gentle support such as netting or obelisks at planting time.
• Overwintering: As annuals, these petunias will complete their cycle in one season—replant each year for repeat displays.

Design Ideas & Companion Plants

• Create vibrant Mediterranean-inspired pots by pairing with trailing lobelia or upright geraniums.
• Add structure with ornamental grasses or complement with silver-leaved artemisia for contrast.

FAQs

• When is the best time to plant Petunia 'Allegra'?
  The ideal time is after the last frost in spring—typically from late April through May in most UK regions.
• How tall will these petunias grow?
  The Allegra collection can reach up to 30–40cm in height and may climb higher with support.
• Do they require special care?
  No special care is needed—just regular watering, feeding, and deadheading will keep them blooming all season long.