We're offering you a 30 or 60 Lobelia Monsoon Plants for £6.99, saving you up to 65% off Thompson and Morgan's's price of £19.99 (correct as of 24.02.2026).

Summer beauty

Lobelia 'Monsoon': A Summer Classic for Vibrant Displays

Lobelia erinus 'Monsoon' is a much-loved annual renowned for its trailing growth and clouds of vivid blue flowers. Perfect for UK gardens, this variety brings a burst of colour and soft texture to your outdoor space throughout the summer months.

• Botanical Family: Campanulaceae
• Growth Habit: Trailing, forming dense cascades ideal for baskets and containers
• Mature Size: Height up to 15cm; trails up to 30cm
• Flowering Period: June to September
• Foliage: Fine, bright green leaves complementing the mass of blue blooms

Why Choose Lobelia 'Monsoon'?

• Season-Long Colour: Enjoy continuous blue blossoms that bring life to patios, balconies, and beds.
• Diverse Planting Options: Use in hanging baskets, mixed containers, or as edging along paths and borders.
• Low Maintenance: Water regularly and deadhead spent flowers to encourage more blooms.
• Youthful Vigor: Young plug plants establish quickly, delivering lush growth and fast results.

Growing Guide

• Position: Prefers full sun but tolerates light shade.
• Soil Requirements: Well-drained, moderately fertile soil. Tolerates neutral to slightly acidic pH (6.0–7.0).
• Sowing & Planting: Plant plugs outdoors after the last frost (typically late May in the UK). Space plants 10–15cm apart.
• Caring Tips: Keep soil moist but not waterlogged. Feed fortnightly with a balanced liquid fertiliser during flowering.
• Pest & Disease Resistance: Generally trouble-free; watch for slugs on young plants.

Design Ideas & Companions

• Lobelia 'Monsoon''s trailing habit pairs beautifully with upright bedding plants like geraniums, petunias, or marigolds.
• Add to mixed summer baskets or plant en masse along border edges for a river of blue colour.

FAQs

• When is the best time to plant Lobelia 'Monsoon'?
  The best time is after the last spring frost—usually late May in the UK—when risk of cold snaps has passed.
• How long will Lobelia 'Monsoon' flower?
  Lobelia typically blooms from June until September if regularly deadheaded and watered.
• What care does it require?
  This annual needs regular watering, occasional feeding, and removal of spent flowers for best results. It thrives in well-drained soil with plenty of sunlight.