Ammi

Ammis in Bath

Ammi majus

A hardy annual grown in the UK for airy white flowers and good cutting stems. Sow in spring for a summer display in borders and cutting patches, or try an autumn sowing in mild areas for stronger plants.

Height90cm
SunlightFull Sun
WaterModerate Water

Growing Guide

Step-by-step instructions for growing Ammi

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
FertiliseNow
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. Sow Seeds

    13 Feb – 16 Mar

    Sow seeds thinly around 13th February - 16th March, just under deep in prepared soil. Keep the surface evenly moist while the seedlings establish, and protect early sowings from birds and slugs.

  2. Thin Seedlings

    14 Mar – 28 Mar

    When seedlings are large enough to handle, thin them to apart so each plant has room to branch. Keep the strongest plants and remove the weaker ones cleanly around 14th March - 28th March.

  3. Plant Out

    13 Apr – 27 Apr

    Set young plants into their final position once they are sturdy, spacing them apart. Water in thoroughly straight after planting, then use fleece if a cold snap is forecast around 13th April - 27th April.

  4. Support Plants

    20 Apr – 20 Apr

    From 20th April, add light stakes or mesh if the plants start to lean. Ammi can flop in exposed spots after rain, so put support in early rather than waiting for stems to bend.

  5. Water and Feed

    4 May – 20 Nov

    From 4th May to 20th November, water during dry spells and give a light balanced liquid feed once at the start of flowering if the soil is poor. Avoid overfeeding, as soft growth makes stems weak and floppy.

  6. Cut Flowers

    19 Jun – 20 Nov

    Cut stems from 19th June as soon as the flower heads open and keep picking through 20th November. Regular cutting encourages more stems, and the flowers last best if you cut early in the day and put them straight into water.

Companion Plants

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

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.

Also in nearby towns

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