Ammis in Old Town

Ammi majus

Ammi
Ammi · 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.

90 cm · Full Sun · Moderate Water

Calibrated to Old Town · last frost ≈ 16 Feb

Sow January to February, plant out March, harvest May to December. Frost risk December to February.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
SowYesYesNoNoNoNoNoNoNoNoNoNo
Plant outNoNoYesNoNoNoNoNoNoNoNoNo
HarvestNoNoNoNoYesYesYesYesYesYesYesYes

Growing guide

Step-by-step instructions for growing Ammi

  1. 01

    Sow Seeds

    2 Jan to 2 Feb

    Sow seeds thinly around 2nd January - 2nd February, just under deep in prepared soil. Keep the surface evenly moist while the seedlings establish, and protect early sowings from birds and slugs.

  2. 02

    Thin Seedlings

    31 Jan to 14 Feb

    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 31st January - 14th February.

  3. 03

    Plant Out

    2 Mar to 16 Mar

    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 2nd March - 16th March.

  4. 04

    Support Plants

    9 Mar to 9 Mar

    From 9th March, 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. 05

    Water and Feed

    23 Mar to 10 Dec

    From 23rd March to 10th December, 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. 06

    Cut Flowers

    8 May to 10 Dec

    Cut stems from 8th May as soon as the flower heads open and keep picking through 10th December. 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.

Ammi guides by town

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