Popular 23 others are looking at this right now

Gladiolus 'Black Jack'Gladioli, Sword Lily

Half-hardy Corm

What is Half-Hardy Corm?
Plant that grows from an underground storage organ. Generally supplied in a
dormant condition with no top growth. Can be grown outdoors
but requires winter protection from frosts and temperatures below 0C.
100% (2 Reviews)

Excellent for cutting

Flamboyant blooms look striking in mixed borders

Perfect for giving height to your garden

Fulfilled and sold by Thompson & Morgan

Choose available pack sizes:

Want to get notified when back in stock?

Loading...
Please note: This product cannot be delivered outside the United Kingdom.

Height Up to 100cm (39in)
Spread Up to 15cm (6in)

Half-hardy Corm

cut flower garden

full sun

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC
Flowering Months

You May Also Like

Black & Gold Patio Pot

118 Reviews
Quick Buy

5 Options From£12.99

Bulb Baskets

107 Reviews
Quick Buy

3 Options From£5.99

Bulb Planter

64 Reviews
Quick Buy

Just£9.99

Empathy Bulb Starter

9 Reviews
Quick Buy

Just£9.99

incredibloom®

135 Reviews
Quick Buy

3 Options From£6.99

incredipeatfree

12 Reviews
Quick Buy

Just£14.99

Description
Striking crimson red blooms edged with a deeper wine red make a bold contribution to any garden colour scheme. The tall stately stems of Gladiolus ‘Black Jack’ will tower above other plants, giving an architectural touch to borders. Gladiolus flowers are perfect for cutting, so you can enjoy them indoors too. Height: 100cm (39"). Spread: 15cm (6"). Supplied as 10/12cm corms.


10 gladiolus corms (KB9299)

How to Grow
March and April are the best time for planting Gladiolus corms. Plant them at a depth of 10cm (4"). Choose a sunny, sheltered position in well drained soil. Add well rotted manure or compost to improve drainage on heavy clay soils. Try planting gladioli in groups of five or seven for greater effect. Stagger planting over a few weeks for a succession of flowers throughout summer.
More Info
Feed and water regularly throughout the growing season. After flowering, allow the foliage to die back naturally as this will help to feed the corms for next years growth. Corms should be lifted, cleaned and dried off during autumn, removing any remaining foliage. During winter store corms in a cool, dry place away from risk of damp or frost. Replant in spring for another wonderful display.
Delivery

Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £2.99.

Orders which include any other products will incur a delivery charge of £4.99.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.99 will apply - regardless of the number of items ordered.

Large items may incur a higher delivery charge - this will be displayed in your shopping basket.

Please see our Delivery page for further details, and more information on different charges that may apply to certain destinations.

For more information on how we send your plants please visit our Helpful Guide on plant sizes.

Reviews

#YourTMGarden

For the chance to be featured, share your plant pictures with us
on Instagram by using the hashtag #YourTMGarden

Sign Up For Exclusive Special Offers

JOIN NOW
RedEye

Sign up for exclusive offers!