Ammis in Paddock

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 Paddock · last frost ≈ 2 May

Sow March to April, plant out May, harvest July to October. Frost risk October to May.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
SowNoNoYesYesNoNoNoNoNoNoNoNo
Plant outNoNoNoNoYesNoNoNoNoNoNoNo
HarvestNoNoNoNoNoNoYesYesYesYesNoNo

Growing guide

Step-by-step instructions for growing Ammi

  1. 01

    Sow Seeds

    18 Mar to 18 Apr

    Sow seeds thinly around 18th March - 18th April, 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

    16 Apr to 30 Apr

    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 16th April - 30th April.

  3. 03

    Plant Out

    16 May to 30 May

    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 16th May - 30th May.

  4. 04

    Support Plants

    23 May to 23 May

    From 23rd May, 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

    6 Jun to 24 Oct

    From 6th June to 24th October, 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

    22 Jul to 24 Oct

    Cut stems from 22nd July as soon as the flower heads open and keep picking through 24th October. 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.