Gladioli Blue Isle will mesmerise with their large 10–12cm blooms in a vibrant violet–purple shade, each petal carrying a soft, almost velvety texture that gives the flowers incredible depth and luxury. These elegant spikes make a striking statement in any garden, adding height, colour, and a touch of drama from mid- to late summer.

For best results, plant your Gladioli in a sunny position — they thrive in full sun but will also perform well in partial sun as long as the soil is well-drained. Planting them in clumps or generous groupings creates a fuller, more eye-catching display, allowing the tall flower spikes to stand proudly together.

If you want to elevate your planting design even further, pair Gladioli Blue Isle with contrasting colours such as soft whites, fiery oranges, or warm pinks to make their purple tones pop. They’re equally stunning in mixed borders, cutting gardens, or as bold focal points in summer arrangements.

Easy to grow and wonderfully rewarding, these Gladioli bring richness and elegance wherever they’re planted. Perfect for gardeners wanting height, drama, and unforgettable colour.

Harts' Hint
Gladiolus can be planted about 2 weeks before the last expected spring frost. Gladiolus will take 70-90days to flower. For a continual display of flowers, plant a few corms every 2 weeks until early summer.

 

For more information on planting and growing Gladioli.

Summer Flowering Bulbs are delivered in Spring

Delivery and P&P

Summer Flowering Bulbs are dispatched from the end of February to the end of May.
All orders should be dispatched within 3-5 working days during this time.
However, during the months of April and May, we may allow up to 10 working days for dispatch due to exhibiting at the flower shows. 
Postage cost to mainland UK (excluding N.Ireland, Highlands and Isles) is £4.99.
All out of area postcodes are charged at £9.50.
Orders over £60 qualify for FREE delivery to mainland UK (excluding N.Ireland, Jersey, Guernsey, Highlands and Isles).
Unfortunately, we are not currently delivering to the EU. See Delivery page.
When your order is due for dispatch, you will receive a tracking email from us to track your parcel.
Your parcel will be sent on a 48 hour tracked service with Yodel.

Returns and Refunds

You have the right to cancel your order at any time before it is dispatched.
All returns must be returned at your cost within 7 days of receipt.
Payment for the returned goods will be refunded within 7 days of the goods being received by us, less the postage charges.

Planting Gladioli in the Garden

• Plant from March to May once the soil has warmed and the risk of hard frost has passed.
• Choose a sunny spot with well-drained soil. Gladioli need plenty of light to flower well.
• Dig a hole 10–15cm (4–6 inches) deep.
• Place the corm with the pointed end facing up.
• Space 10–15cm apart.
• Cover with soil and firm gently.
• Water well after planting.

Planting Gladioli in Pots

• Use a large pot with drainage holes.
• Fill with good quality, free-draining compost.
• Plant corms 10–15cm deep.
• Space a little closer than in the ground (about 8–10cm apart).
• Place in a sunny, sheltered spot.
• Water well after planting and keep compost moist but not waterlogged.

Aftercare / Overwintering

During the growing season:

• Water regularly in dry weather.
• Feed every couple of weeks with a high-potash feed once buds appear.
• Stake taller varieties if needed.

After flowering:

• Allow foliage to die back naturally.
• Once yellow, cut back the leaves.

• Shake off soil and allow to dry.
• Store in a cool, dry, frost-free place over winter.
• Replant the following spring.