We're offering you a 60 or 120 Rainbow Perennial Plants for £11.99, saving you up to 45% off Thompson and Morgan's's price of £21.99 (correct as of 04.03.2026).

Brighten Your Garden with the Best Value Rainbow Perennial Collection

Burst into Colour: The Rainbow Perennial Flowering Plants Collection

Transform your garden with a curated selection of hardy perennial flowering plants, chosen for their ability to deliver a spectacular display of colour from late spring through to autumn. This collection is ideal for gardeners seeking reliable, long-lasting blooms that return year after year.

Why Choose Perennials?

• Sustained Interest: Unlike annuals, perennials come back each season, providing lasting value and reducing the need for replanting.
• Diverse Selection: Each pack contains a mix of flower shapes, heights, and colours, ensuring dynamic visual interest across your borders and beds.
• Wildlife Friendly: Many perennial varieties attract pollinators such as bees and butterflies, supporting your local ecosystem.

Growing Guide

• Planting Time: Best planted between February and April, or September to October for autumn root establishment.
• Soil Preferences: Most UK garden soils are suitable; ensure well-drained conditions. Amend heavy clay with compost if needed.
• Sun Requirements: Thrive in full sun to partial shade. For best results, position where they receive at least 4–6 hours of sunlight daily.

Caring for Your Perennial Collection

• Watering: Water regularly during the first growing season to establish roots. Once established, perennials are drought tolerant and low maintenance.
• Feeding: Apply a balanced slow-release fertiliser in early spring as new growth appears.
• Pruning: Deadhead spent blooms to prolong flowering. Cut back foliage in late autumn or early winter after it dies down naturally.

Design Tips & Usage Ideas

• Create bold borders by grouping taller varieties at the back and shorter ones at the front.
• Add texture and contrast by mixing leaf shapes and flower forms.
• Companion planting: Pair with ornamental grasses, lavender, or evergreen shrubs for year-round structure.

FAQs

• When is the best time to plant these perennials?
  The ideal planting times are early spring (February–April) or early autumn (September–October).
• How much space should I allow between plants?
  Aim for 20–30cm spacing depending on the mature size listed on each plant label to allow good airflow and healthy growth.
• Do these perennials require special care?
  No special care is needed—just plant in well-drained soil, water until established, and deadhead spent flowers to encourage more blooms.