Highlights

Striking Summer Blooms – Tall flower spikes burst with vibrant colours from July to September.
Easy to Grow – Thrives in full sun and well-drained soil; ideal for beginners and experienced gardeners.
Perfect for Cut Flowers – Long-lasting stems bring dramatic flair to bouquets and arrangements.
Perennial Reliability – Returns each year, adding lasting beauty to borders and beds.
Flexible Planting – Plant bulbs from March to May for best results; suitable for containers or open ground.
Height & Impact – Grows up to 1m tall, creating a bold statement in any garden display.

We're offering you a 50 or 100 Gladioli Mixed Bulbs for £6.99, saving you up to 50% off Thompson and Morgan's's price of £13.99 (correct as of 20.01.2026).

Gladioli Mixed: Bold Colour for Your Summer Garden

Gladiolus, known as the 'sword lily,' is a classic perennial beloved for its upright spikes packed with funnel-shaped blooms. This mixed selection features a vibrant palette that enlivens garden borders, patio pots, and floral arrangements alike.

Botanical name: Gladiolus hortulanus
Mature height: Typically 80–100cm (31–39in)
Flowering period: July to September
Hardiness: Half-hardy perennial (protect from severe frost)

Why Choose Gladioli Mixed?

Towering stems create vertical drama and structure in mixed borders.
Diverse colours offer bold visual impact—ideal for mass planting or spot accents.
Excellent cut flowers: Each stem lasts up to two weeks in a vase when cut as lower buds open.
Low maintenance: Suitable for gardeners of all experience levels.

Growing Guide & Care Tips

Planting time: March–May, after the last frost.
Site: Full sun; sheltered from strong winds.
Soil: Well-drained, moderately fertile soil (neutral to slightly acidic pH preferred).
Spacing: Plant bulbs 10–15cm apart and 10–15cm deep.
Watering: Water regularly during dry spells but avoid waterlogging.
Lifting bulbs: In colder regions, lift bulbs after foliage dies back and store frost-free over winter.
No pruning required: Simply remove faded flower spikes and allow foliage to die back naturally.

Garden Design Ideas & Companions

Add height behind lower annuals like marigolds or zinnias.
Create eye-catching bouquets with dahlias, lilies, or sunflowers.
Suits cottage gardens, contemporary beds, or patio containers alike.

FAQs

When is the best time to plant Gladioli bulbs?
The ideal planting window is March through May, once the risk of frost has passed.
How long do Gladioli take to flower?
Blooms appear roughly 8–12 weeks after planting—expect vibrant colour from mid-summer onwards.
Can I leave Gladioli bulbs in the ground over winter?
If you garden in milder areas (UK zones 8–9), you may leave them in well-drained soil. In colder regions, lift and store bulbs after foliage dies back to prevent frost damage.