Gladiolus

Gladioluses in Barnston

Gladiolus spp.

Half-hardy corms grown for tall summer flower spikes. Plant corms in a sunny, sheltered spot after frost risk has passed, or start them in pots under cover for an earlier display.

Height120cm
SunlightFull Sun
WaterModerate Water

Growing Guide

Step-by-step instructions for growing Gladiolus

Planting Calendar

Seed DirectLater
J
F
M
A
M
J
J
A
S
O
N
D
TransplantLater
J
F
M
A
M
J
J
A
S
O
N
D
HarvestNow
J
F
M
A
M
J
J
A
S
O
N
D
MaintenanceLater
J
F
M
A
M
J
J
A
S
O
N
D
  1. Start Corms

    14 Feb – 17 May
    every 2 weeks

    Plant corms around 14th February - 17th May. Set them with the pointed end up, at a depth of , and space them apart. Keep the earliest sowings under cover in pots if frost is still a risk, then stagger further plantings every 14 days for a longer display.

  2. Plant Out and Stake

    30 Apr – 14 May

    Move pot-grown corms into their final position from 30th April, once the soil has warmed and frost risk has passed. Water them in thoroughly straight after planting, then put in canes or discreet supports before the stems get tall so wind does not rock the corms loose.

  3. Cut and Deadhead

    30 Jul – 22 Oct

    From 30th July to 22nd October, cut spikes for the house when the lowest florets begin to open. Remove spent flowers regularly and keep the stem base fed and watered in dry spells so more blooms follow.

  4. Lift and Store Corms

    22 Oct – 5 Nov

    After 22nd October - 5th November, once frost has blackened the foliage, cut the stems down, lift the corms and dry them for a few days in a warm airy place. Store them frost-free in dry compost or peat-free dry material. In mild areas with free-draining soil, a thick dry mulch can sometimes be enough to keep them in place.

Companion Plants

Tap a plant to see why it works (or doesn't) with Gladiolus.

Good companions

Plants to avoid

Why companion planting matters

Companion planting can deter pests, improve pollination, and make better use of space. Some plants confuse pests or attract beneficial insects; others improve soil or offer shade to neighbours that need it.

Suggested Varieties

Popular varieties of Gladiolus to consider

Black Star

Deep burgundy-red flowers with good stem length for cutting.

Traderhorn

Classic bright red spikes, widely grown in UK gardens.

Atom

White flowers with a red edge, useful for a lighter colour scheme.

Priscilla

Large pink-and-white blooms on strong stems.

Also in nearby towns

See how Gladiolus timing shifts in other towns with different frost dates.