Ammis in Parney Heath

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 Parney Heath · last frost ≈ 15 May

Sow March to May, plant out May to June, harvest August to October. Frost risk October to May.
ActivityJanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember
SowNoNoYesYesYesNoNoNoNoNoNoNo
Plant outNoNoNoNoYesYesNoNoNoNoNoNo
HarvestNoNoNoNoNoNoNoYesYesYesNoNo

Growing guide

Step-by-step instructions for growing Ammi

  1. 01

    Sow Seeds

    31 Mar to 1 May

    Sow seeds thinly around 31st March - 1st May, 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

    29 Apr to 13 May

    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 29th April - 13th May.

  3. 03

    Plant Out

    29 May to 12 Jun

    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 29th May - 12th June.

  4. 04

    Support Plants

    5 Jun to 5 Jun

    From 5th June, 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

    19 Jun to 14 Oct

    From 19th June to 14th 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

    4 Aug to 14 Oct

    Cut stems from 4th August as soon as the flower heads open and keep picking through 14th 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.