Gladioli flower

How to plant gladioli corms

Find out how to plant gladioli corms, for a spectacular display in summer.

A table displaying which months are best to sow, plant and harvest.
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
At its best
At its best

Plant is not at its best in January

Plant is not at its best in February

Plant is not at its best in March

Plant is not at its best in April

Plant is not at its best in May

Plant is at its best in June

Plant is at its best in July

Plant is at its best in August

Plant is not at its best in September

Plant is not at its best in October

Plant is not at its best in November

Plant is not at its best in December

To do
To do

Do not To do in January

Do To do in February

Do To do in March

Do not To do in April

Do not To do in May

Do not To do in June

Do not To do in July

Do not To do in August

Do not To do in September

Do not To do in October

Do not To do in November

Do not To do in December

A little effort planting gladioli corms in spring can yield impressive results in summer. For maximum impact, plant in pots successionally over a few weeks, so you have a longer season of colour. Simply plunge each pot into your border when the flowers are at their most spectacular, and replace with a fresh pot when needed.

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You Will Need

  • Gladioli corms
  • 20cm diameter pot
  • Multi-purpose, peat-free compost
  • Broken terracotta pot, plastic pots or large stones, for drainage
  • Label and pencil

Total time:

Step 1

Planting gladioli corms - adding drainage material to the pot
Planting gladioli corms – adding drainage material to the pot

Add good drainage material to the base of the pots, such as polystyrene pieces, broken pots, or pebbles.

Step 2

Planting gladioli corms - planting the corms in compost
Planting gladioli corms – planting the corms in compost

Fill the pots with multi-purpose compost and plant corms hairy side down, 15cm (6in) below the soil to prevent the stems from keeling over. Cover the corms with compost.

Step 3

Planting gladioli corms - watering the pots
Planting gladioli corms – watering the pots

Label each pot, then water thoroughly and leave to drain. Place in a warm, bright spot, such as a window ledge or in the greenhouse.

Step 4

Planting gladioli corms - young shoots emerging
Planting gladioli corms – young shoots emerging

In warm conditions, the corms will sprout within a few days. Keep the pots well watered. Gradually harden off the plants, then place them in a sunny outdoor location, once all risk of frost has passed.

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